Grammar Rule in 30 Seconds
Always use object pronouns (him, her, me, us, them) after the verb 'let' when giving a command or permission.
- Use 'him' after let: 'Let him go' (not 'Let he go').
- Use 'us' for suggestions: 'Let us (Let's) start the meeting.'
- Avoid 'he' unless it's a very rare archaic quote like 'Let he who is without sin...'
Overview
let という動詞の後に he を使うべきか、それとも him を使うべきかという問題は、中級レベル（B1）の学習者にとっても非常に混同しやすいポイントです。結論から言えば、正解は常に let him です。let he という表現は、現代の標準的な英語では文法的に誤りとされています。let という動詞が持つ「他動詞」かつ「使役動詞」としての性質が、英語の文構造の根幹に関わっているからです。英語は日本語と異なり、単語の「位置」と「形」がその役割を決定します。日本語であれば「彼が（主語）」や「彼を（目的語）」のように、助詞（は・が・を・に）を付け替えるだけで役割を表現できますが、英語では代名詞そのものの形を he から him へと変化させる必要があります。let him が正しいのか、その背後にある文法ルールを徹底的に解剖します。主格と目的格の違い、使役動詞の特殊なパターン、そして日本人がつい間違えてしまう理由を理解することで、自信を持って自然な英語を話せるようになることを目指します。単なる暗記ではなく、「なぜそうなるのか」という論理をマスターしましょう。let him の形を理解するためには、3つの重要な文法概念を整理する必要があります。それは「代名詞の格（Pronoun Case）」、「他動詞（Transitive Verbs）」、そして「使役動詞（Causative Verbs）」です。- 主格 (Subject Pronouns):
I,you,he,she,it,we,they。これらは動詞の前に置かれ、アクションを行う人を指します。例：He called me.（彼が私に電話した） - 目的格 (Object Pronouns):
me,you,him,her,it,us,them。これらは動詞や前置詞の後に置かれ、アクションを受ける人を指します。例：I called him.（私が彼に電話した）
I, he, she, we, they |me, him, her, us, them |let は「〜に（何かを）させる／許す」という意味の動詞であり、その後に来る人は「許可を受ける側」、つまり「目的語」になります。したがって、必ず目的格の him や her を使わなければなりません。letlet は典型的な他動詞です。例えば、The boss let...（上司は〜させた）と言いかけた場合、聞き手は必ず「誰を？」という情報を求めます。この「誰を」に当たる部分が目的語であり、代名詞を使う場合は目的格にするのが鉄則です。let は「使役動詞」という特別なグループに属します。使役動詞とは、「（主語）が（目的語）に（動作）をさせる／してもらう／許す」という構造を作る動詞です。let の最大の特徴は、目的語の後に続く動詞が「原形（Bare Infinitive）」になることです。通常、動詞を2つ並べる時は want to go のように to を挟みますが、let の場合は to を使いません。let+ 目的語 + 動詞の原形
let him go（彼に行かせてあげる）という形が完成します。let を使った文章の構成は、非常にシンプルで一貫しています。以下のパターンを頭に叩き込みましょう。Let + 目的格（代名詞 or 名詞） + 動詞の原形he かな？」と迷わないように注意しましょう。Let me check. | *Let I check. | *Let me to check. |Let him finish. | *Let he finish. | *Let him to finish. |Let her speak. | *Let she speak. | *Let her to speak. |Let us go. (Let's go) | *Let we go. | *Let us to go. |Let them decide. | *Let they decide. | *Let them to decide. |- 1
Let: 文章の核となる動詞です。命令文や提案ではこの形で始まります。 - 2目的格: 動作の許可を受ける人です。代名詞（
him,usなど）だけでなく、具体的な名詞（the staff,my son）が入ることもあります。 - 3動詞の原形:
toを付けず、またsなどの変化もさせない、辞書に載っているそのままの形です。
Please let the visitors enter the room.（来客の方々を部屋に入れてあげてください。）Don't let that mistake discourage you.（そのミスに落ち込まないでください。）
let + 目的語 + 原形 の形は、日常生活やビジネスシーンの様々な場面で登場します。主な4つのシチュエーションを見ていきましょう。let の最も基本的な使い方です。「〜したいようにさせてあげる」「〜するのを許す」というニュアンスです。My boss let me work from home today.（今日、上司は私に在宅勤務をさせてくれた。）The security guard didn't let him pass without an ID.（警備員は、IDなしで彼を通さなかった。）
Let's)Let's は、実は Let us の短縮形です。「私たちに〜させてください」という直訳から転じて、「（一緒に）〜しましょう」という提案になります。It's a beautiful day. Let's (Let us) go for a walk.（いい天気ですね。散歩に行きましょう。）Let's not waste any more time.（これ以上時間を無駄にするのはやめましょう。）
If he has something to say, let him speak.（彼に言いたいことがあるなら、言わせてあげなさい。）Don't interrupt her. Let her finish the presentation.（彼女を遮らないで。プレゼンを最後までさせてあげて。）
Let it be known that we are committed to this project.（我々がこのプロジェクトに全力を尽くしていることを、皆に知らしめよう。）Let the record show that the meeting started on time.（会議が定刻に始まったことを記録に留めよう。）
he を選んでしまい、*Let he speak と言ってしまうのです。- なぜ間違えるのか: 日本語の助詞「が」は主語をマークしますが、英語の
let構文では、意味上の主語（話す人）であっても、文法上の役割はletの目的語（受ける人）になるからです。 - 修正:
Let him speak.と常に目的格を使うよう意識しましょう。
to を入れてしまうwant to, hope to, decide to など、英語の多くの動詞は後ろに to を伴うため、その癖で *Let him to go と言ってしまうケースです。- なぜ間違えるのか: 日本の学校教育で「動詞を繋ぐときは
to」と強く刷り込まれているためです。しかし、使役動詞（let,make,have）は例外的にtoを嫌う性質があると覚えましょう。 - 修正:
Let him go.(toは不要！)
I の使用*Let my colleague and I check it と言ってしまうミスです。これは中・上級者でも間違えることがあります。- なぜ間違えるのか: 丁寧な言い方として
My colleague and Iというセットが頭にあるためですが、letの後なのでIも目的格のmeに変える必要があります。 - 修正:
Let my colleague and me check it.（迷ったら、my colleagueを隠してみてください。Let I checkとは言わないはずです。）
let と似た意味を持つ他の表現と比較することで、使い分けを明確にしましょう。Let vs Allow / PermitLet | Allow / Permit |Let him go. | Allow him to go. |Allow を使いますが、その際は to を忘れないようにしましょう。Let vs Make vs Have (使役動詞の比較)Let(許可): 本人がやりたいことを「許す」。強制力はゼロ。Make(強制): 本人がやりたくないことを「無理やりさせる」。強制力が強い。Have(依頼・義務): 役割として「してもらう」。プロに頼むときや部下に指示するとき。
let と同じく、to を使わない「原形不定詞」のパターンをとります。Let's の後に he や him を続けることはできますか？Let's は Let us の略なので、すでに「私たち」という目的語が含まれています。その後に別の代名詞を置くことは文法的に不可能です。もし「彼に〜させよう」と言いたいなら、s を取って Let him... と言います。Let の後に名前が来る場合はどうなりますか？Let Tanaka-san handle this.（田中さんにこれを任せましょう）のように、そのまま置くだけでOKです。形が変わるのは代名詞（I, he, she など）だけです。Let me know と Please tell me はどう違いますか？Let me know は「（分かった時点で）私に知らせてね」という少し柔らかく、相手に配慮したニュアンスです。Please tell me はより直接的に「教えてください」と情報を求めています。ビジネスシーンでは Let me know が非常に好まれます。him はそのままですか？let の過去形は同じ形の let ですが、時制が変わっても目的格のルールは変わりません。Yesterday, he let me use his car.（昨日、彼は私に車を使わせてくれた）のように、常に目的格を使います。Pronoun Case after 'Let'
| Subject Pronoun | Object Pronoun (Correct) | Example Sentence |
|---|---|---|
|
I
|
me
|
Let me help.
|
|
You
|
you
|
Let you be the judge.
|
|
He
|
him
|
Let him try.
|
|
She
|
her
|
Let her speak.
|
|
It
|
it
|
Let it be.
|
|
We
|
us
|
Let us pray.
|
|
They
|
them
|
Let them eat.
|
Common Contractions
| Full Form | Contraction | Usage |
|---|---|---|
|
Let us
|
Let's
|
Suggestions (Let's go!)
|
|
Do not let
|
Don't let
|
Prohibition (Don't let him!)
|
Meanings
The verb 'let' is used to give permission, make suggestions, or issue commands. Because 'let' is a transitive verb, the person receiving the action must be in the objective case.
Permission
Allowing someone to do something.
“My boss won't let him leave early.”
“Will you let her borrow your car?”
Suggestions (First Person Plural)
Using 'let us' (usually contracted to 'let's') to propose an action.
“Let us consider the facts.”
“Let's go to the beach this weekend.”
Archaic/Literary Imperative
A formal or biblical way of stating a condition or command, often using 'he' incorrectly by modern standards.
“Let he who is without sin cast the first stone.”
“Let no man put asunder what God has joined.”
Reference Table
| 主格（Letの後はNG） | 目的格（Letの後はこれ！） | Letを使った正しい例文 |
|---|---|---|
|
`I`
|
`me`
|
Let `me` help you with that.
|
|
`You`
|
`you`
|
I'll let `you` decide.
|
|
`He`
|
`him`
|
Let `him` go to the party.
|
|
`She`
|
`her`
|
Don't let `her` see the surprise.
|
|
`It`
|
`it`
|
The cat wants to go outside. Let `it` out.
|
|
`We`
|
`us`
|
Let `us` know your decision.
|
|
`They`
|
`them`
|
They look tired. Let `them` rest.
|
フォーマル度スペクトル
Please permit him to enter the premises. (Security gate)
Let him in, please. (Security gate)
Let 'im in. (Security gate)
Let the man through! (Security gate)
Let の基本ルール
後ろに来るのは必ず...
- 目的格代名詞 me, you, him, her, it, us, them
これはNG！
- 主格代名詞 I, you, he, she, it, we, they
その後の動詞は...
- 原形 go, see, do, be
主格 vs 目的格
Let の後の代名詞チェック
Let の直後は代名詞ですか？
それは「目的格」（me, him, her 等）ですか？
代名詞の役割分け
❌ Let の後に使わない
- • I
- • He
- • She
- • We
- • They
✅ Let の後に使う
- • Me
- • Him
- • Her
- • Us
- • Them
レベル別の例文
Let him in.
Let him in.
Let me see.
Let me see.
Let us go.
Let us go.
Let them play.
Let them play.
Don't let him drive your car.
Don't let him drive your car.
Will you let her stay tonight?
Will you let her stay tonight?
Please let us know your plans.
Please let us know your plans.
My dad won't let me go to the party.
My dad won't let me go to the party.
If he is tired, let him rest for a while.
If he is tired, let him rest for a while.
Let's not let them influence our decision.
Let's not let them influence our decision.
Why won't you let her explain what happened?
Why won't you let her explain what happened?
Let us assume that the report is correct.
Let us assume that the report is correct.
The security guard wouldn't let him through without ID.
The security guard wouldn't let him through without ID.
Don't let him get under your skin with those comments.
Don't let him get under your skin with those comments.
Let her be the one to decide her own future.
Let her be the one to decide her own future.
We should let them handle the technical details.
We should let them handle the technical details.
Let him who thinks he stands take heed lest he fall.
Let him who thinks he stands take heed lest he fall.
The company decided to let him go after the scandal.
The company decided to let him go after the scandal.
Let us not be deterred by these temporary setbacks.
Let us not be deterred by these temporary setbacks.
Should we let them proceed despite the obvious risks?
Should we let them proceed despite the obvious risks?
Let he who is without sin cast the first stone—though grammatically suspect, the phrase remains iconic.
Let he who is without sin cast the first stone—though grammatically suspect, the phrase remains iconic.
The magistrate would not let him off the hook so easily.
The magistrate would not let him off the hook so easily.
Let us delve deeper into the socio-economic implications.
Let us delve deeper into the socio-economic implications.
To let him suffer in silence would be a grave injustice.
To let him suffer in silence would be a grave injustice.
間違えやすい
Learners often use 'leave' when they mean 'allow' (let).
Confusing the imperative with the third-person singular.
Confusing the contraction of 'let us' with the verb 'lets'.
よくある間違い
Let he go.
Let him go.
Let him to play.
Let him play.
Let's we go.
Let's go.
My mom let me.
My mom lets me.
Please let they enter.
Please let them enter.
He let her to leave.
He let her leave.
Don't let he see.
Don't let him see.
Let he who wants to come, come.
Let him who wants to come, come.
I'll let you to know.
I'll let you know.
She lets he stay.
She lets him stay.
Let he who is without sin...
Let him who is without sin...
文型パターン
Let ___ (object) ___ (verb).
Don't let ___ (object) ___ (verb).
Why won't you let ___ (object) ___ (verb)?
Real World Usage
Let him know I'm running late.
Please let us know your availability.
Don't let them dull your sparkle!
Will they let him through customs?
Just let him leave the food at the door.
I won't let him watch that movie.
「Me」に置き換えてチェック！
Let I go とは言わないよね？ Let me go. が正解なら、him や her も正解だよ。「And」がある時に注意
Let Sarah and himが正解で、
Let Sarah and heは間違いだよ。
「'em」でネイティブっぽく
let them を縮めて "let 'em« と言うよ。 »Just let 'em go" と言えると、すごく自然に聞こえるよ！「Let me」でスマートに提案
Let me は親切な申し出にぴったり。 「手伝おうか？」と聞くより Let me help you with your bags.の方が積極的で好印象だよ。
Smart Tips
Stop and think of the phrase 'Let me'. Since 'me' is an object, 'him' must be the object too.
Use 'Let us know' instead of 'Let's know' to sound more professional.
Names don't change, but the rule for the verb does. Still no 'to'!
Notice that it's always followed by an action. It's the easiest way to suggest something.
発音
H-Dropping
In fast, casual speech, the 'h' in 'him' or 'her' is often dropped.
Flap T
In American English, the 't' in 'let' sounds like a quick 'd' when followed by a vowel.
Imperative Stress
Let HIM do it! (Stress on 'him')
Emphasizing that a specific person should do the task.
暗記しよう
記憶術
Let HIM in, don't let HE win. (Always use the object pronoun!)
視覚的連想
Imagine a bouncer at a club named 'Let'. He only allows people with 'Object' ID cards (me, him, her, us, them) to enter. If someone shows a 'Subject' ID (I, he, she, we, they), he turns them away.
Rhyme
Let him, let her, let them too / Never use 'he' or 'they', it's true!
Story
A king wanted to allow a peasant to enter his castle. He shouted to the guards, 'Let he enter!' but the royal grammarian corrected him, 'Your Majesty, it's Let HIM enter!' The king was so embarrassed he never forgot again.
Word Web
チャレンジ
Write 5 sentences using 'let' with 5 different object pronouns (me, him, her, us, them) about things you want to do today.
文化メモ
The phrase 'Let he who is without sin' is from the King James Bible. Many native speakers think 'Let he' sounds 'holy' or 'smart' because of this, even though it's technically wrong.
The song 'Let It Go' from Frozen uses 'let' with the object 'it'. It's a perfect example of the standard rule.
In some Northern British dialects, 'let' is used in unique ways, but the pronoun rule 'let him' remains the standard for clarity.
From Old English 'lætan', meaning to leave, allow, or let go.
会話のきっかけ
Will your parents let you travel alone?
If you were a boss, would you let your employees work from home?
Let's imagine you won the lottery. What's the first thing you'd do?
Do you think schools should let students choose their own subjects?
日記のテーマ
よくある間違い
Test Yourself
He looks tired. You should let ___ rest for a while.
Find and fix the mistake:
The teacher let we leave class early today.
Choose the correct sentence:
Score: /3
練習問題
8 exercisesPlease let ___ finish his homework before he goes out.
Find and fix the mistake:
My teacher lets we use our phones in class.
Don't let him ___ (see) the surprise yet!
Allow him to enter the room.
'Let he who is hungry eat first.'
A: Can John come with us? B: No, his mom won't ___.
Pick the correct way to suggest a movie.
Match: 1. He, 2. They, 3. We
Score: /8
Practice Bank
13 exercisesDon't let ___ boss you around. Stand up for yourself!
Please let him ___ his story before you judge.
Why don't you let you and he figure it out?
Choose the correct sentence:
「彼にもう一度挑戦させてあげて」を英語にしよう。
単語を並べ替えて正しい文を作ってね。
主語に対応する Let の形を繋いでね。
I don't know the answer, so let's ask Sarah. Let ___ explain it.
My phone died, so my friend let I use his.
「夕食の前に彼らにデザートを食べさせないで」を英語にしよう。
ビジネスメールで最も適切なのはどれ？
疑問文を作ってみよう。
文の前半と後半を正しく繋いでね。
Score: /13
よくある質問 (8)
Only in archaic, biblical, or poetic contexts. In modern English, it is always `let him`.
`Let` is used for imperatives or with 'I/you/we/they'. `Lets` is only used for 'he/she/it' in the present tense (e.g., 'He lets me go').
No. After `let`, you must use the bare infinitive (the verb without 'to').
`Let's` is a contraction of `let us`. It is used to make a suggestion that includes the speaker.
Yes, `let us` is typically found in formal speeches, prayers, or legal documents.
Use 'don't let' (e.g., `Don't let him leave`).
Rarely. Instead of 'He was let go', we usually say `He was allowed to go` (unless 'let go' means 'fired').
It means 'leave it alone' or 'accept the situation as it is'. It uses the object pronoun `it`.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Dejar / Permitir
English uses the bare infinitive, while Spanish often uses the subjunctive.
Laisser
Pronoun placement in French changes in negatives, whereas English stays the same.
Lassen
German word order can place the infinitive at the end of the sentence.
〜させる (Saseru)
Japanese incorporates the 'let' meaning into the verb conjugation itself.
دع (Da') / اسمح (Ismah)
Arabic pronouns are attached to the verb as suffixes.
让 (Ràng)
Chinese pronouns do not change form between subject and object, which causes confusion for Chinese learners of English.
Learning Path
Prerequisites
関連動画
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