become的过去式和过去分词怎么写?

　　He's become quite a fundi on wine.

　　他成了葡萄酒的行家。

　　Wearing fur has become unfashionable.

　　穿裘皮服装已经变得不流行了。

　　The reforms have recently become law.

　　这些改革最近已成为法律。

　　He became edgy and defensive.

　　他变得烦躁不安且存有戒心。

　　The journey soon became tedious.

　　那次旅行不久就变得乏味起来。