追う

§ Don't confuse it with 追いかける (oikakeru)

Many learners mix up 追う (ou) and 追いかける (oikakeru) because they both mean 'to chase.' While they are similar, there's a subtle but important difference. 追う (ou) is generally used for a more sustained, long-term pursuit, or when the goal is not necessarily to catch something immediately. Think of pursuing a dream, a career, or a target in business. 追いかける (oikakeru), on the other hand, implies a more active, often physical, and immediate chase with the clear intention of catching up or reaching something quickly. For instance, a child chasing a ball or a dog chasing a cat.

Wrong Example

猫がボールを追った。(Neko ga bōru o otta.)

While not strictly 'wrong,' it's less natural here. It sounds like the cat was passively observing or following the ball for a long time, rather than actively playing with it.

This sounds more natural for a cat actively playing with a ball.

§ Forgetting the particle を (o)

追う (ou) is a transitive verb, which means it always takes a direct object. This object is marked by the particle を (o). A common mistake is to omit this particle or use a different one, which can make your sentence grammatically incorrect or change its meaning entirely.

Wrong Example

彼は夢に追っている。(Kare wa yume ni otte iru.)

Using に (ni) here is incorrect. に (ni) often indicates a destination or indirect object, but not the direct object of 追う (ou).

This means 'He is pursuing his dream.' The を (o) particle correctly marks 夢 (yume, dream) as the direct object of the verb 追う (ou).

§ Misunderstanding its nuance in specific contexts

While 追う (ou) primarily means 'to chase' or 'to pursue,' its nuance can vary depending on the context. Sometimes, it can mean 'to follow' (as in following a path or a trend), or 'to track' (as in tracking progress). Not recognizing these different shades of meaning can lead to misinterpretations or unnatural phrasing.

• Context: Following a path

  The river follows the mountain range.

  川は山脈に沿って流れる。(Kawa wa sanmyaku ni sotte nagareru.)

  Using 追う (ou) here would sound like the river is actively chasing the mountain range, which is illogical. The correct expression is 沿って流れる (sotte nagareru), meaning 'to flow along.'

• Context: Tracking progress

  We need to track our sales figures.

  売上高を追跡する必要がある。(Uriagedaka o tsuiseki suru hitsuyō ga aru.)

  While you *can* use 追う (ou) in some tracking contexts, 追跡する (tsuiseki suru) is a more specific and common verb for 'to track' or 'to trace,' especially for data or movements.