ie ni kaettara, kooto o nugimasu.

When I get home, I take off my coat.

Breakdown of ie ni kaettara, kooto o nugimasu.

• に: destination particle
• を: direct object particle
• 家いえ: home
• 〜たら: conditional form

Questions & Answers about ie ni kaettara, kooto o nugimasu.

What does 帰ったら mean here?

帰ったら means when/after (someone) returns home.

It comes from:

• 帰る = to return, to go home
• 帰った = returned
• 帰ったら = if/when/after returning

In this sentence, 〜たら is not really a strong if in the English sense. It often means when or after, especially when one action happens first and the next action follows.

So the sentence has the feel of:

• When I get home, I take off my coat
• After I get home, I take off my coat

Why is 帰る changed to 帰ったら instead of staying as 帰る?

Because 〜たら attaches to the past plain form of the verb.

So:

• 帰る → dictionary form
• 帰った → past plain form
• 帰ったら → when/if/after returning

This is just how the grammar works. Even though it uses the past form, it does not necessarily mean the whole sentence is in the past. In this pattern, the past form is simply the base used before ら.

Why is there に after 家?