Tenho que estudar.

Use Tenho que estudar when you need to inform someone about your study plans. This could be when your friends invite you out. Or when your family asks what you're doing. It works in many situations. You can use it to explain why you can't do something else. It's a polite way to set boundaries. It shows responsibility. You can also use it to motivate yourself. Saying it out loud can be a good reminder. It’s like a personal pep talk.

This phrase is quite versatile. It can be used in most everyday situations. It’s not overly formal, but it's not slang either. You can say it to your best friend. You can also say it to your teacher. It fits well in casual chats. It also works in slightly more formal settings. Think of a study group meeting. Or a brief mention to a colleague. It’s a safe bet for most contexts. Just adjust your tone. A relaxed tone is for friends. A more serious tone is for official matters.

Imagine you're scrolling TikTok. You see a funny dance. But you have a big exam tomorrow. You might comment: "Não posso fazer isso agora, tenho que estudar." Or maybe your mom calls. She asks about your weekend plans. You reply: "Noite de sexta? Tenho que estudar para a prova de biologia." It’s perfect for explaining your absence. It’s also great for setting expectations. Your friends know you're busy. They won't be surprised if you decline plans.

Use Tenho que estudar when:

• You're declining a social invitation because of studies.
• You need to explain your absence from an event.
• You're telling someone about your upcoming academic workload.
• You're reminding yourself of your responsibilities.
• You want to set expectations about your availability.
• You are talking about preparing for a specific test or exam. It’s a very common phrase.

Avoid Tenho que estudar when:

• You're actually just relaxing or watching Netflix. Don't lie! It's not a "Netflix and chill" excuse.
• You're talking about leisure reading or hobbies. Unless it's for a specific course, of course.
• You want to express a strong desire to study. There are other phrases for that.
• You're in a very formal speech or presentation. Unless directly relevant to your academic role.
• You're trying to sound super enthusiastic about studying. It implies obligation, not passion.

Learners sometimes forget the que. They might say "Tenho estudar." This sounds a bit off. The que is crucial here. It connects tenho (I have) with the infinitive verb estudar (to study). Another mistake is using the wrong verb form. Forgetting the tenho altogether is also an issue. Always remember Eu tenho que... or just Tenho que....

In Brazil, you might hear Preciso estudar more often. Preciso means "I need." It's very similar in meaning and usage. Sometimes, people shorten it in very casual speech. They might say just Estudar! with an emphatic tone. In Portugal, Tenho que estudar is very standard. Tenho de estudar is also used, especially in Portugal. It's grammatically correct and common. It means the same thing. Think of it as a slight regional flavor. Both are perfectly understood.