Chau ちゃう


Informal equivalent of te shimau (usually used by women)
Meaning: be going to (do), finish (doing), (do something) completely.
It is used after stem of te-form of verbs whose dictionary form ends with: -u, -ku, -tsu, or –ru.
It becomes jau (the informal version of de shimau) after the stem of te-form of verbs whose dictionary form ends with: -bu, -gu, -mu, or –nu.
It is sometimes followed by no when forming a question. The past forms are chatta/jatta (plain) and chaimashita/jaimashita (polite).
1. After the stem of te-form of verb
もう帰っちゃうんですか。
Mou kaechau ndesuka.
Are you going to leave so soon?
今日はどんどん飲んじゃいます
Kyou wa dondon nonjaimasu.
I’m going to drink like a crazy today.
彼女に悪いことをしちゃいました
Kanojo ni warui koto o shichaimashita.
I’ve done wrong to her.

-> See also te shimau