become的词性变化有哪些（become有实义动词的用法吗）

become [bi'kʌm]

动词v. 变成,变得

系动词vbl. 变得

例句:

The meeting began to become clamorous.

会议开始变得喧哗了。

I was pleased to see how peaceable the horse had become.

我很高兴地看到这匹马变得这么温顺。

Vast areas of land have become desert.

广大的地区均已变成沙漠