become的過去式和過去分詞怎么寫?

　　He's become quite a fundi on wine.

　　他成了葡萄酒的行家。

　　Wearing fur has become unfashionable.

　　穿裘皮服裝已經變得不流行了。

　　The reforms have recently become law.

　　這些改革最近已成為法律。

　　He became edgy and defensive.

　　他變得煩躁不安且存有戒心。

　　The journey soon became tedious.

　　那次旅行不久就變得乏味起來。