become是動詞，后面一般不能跟動詞原形，只能跟名詞化的（動名詞，也就是動詞+ing），或者動詞+ed或者動詞分詞作形容詞用。

become的意思

vi.變?yōu)椋蔀?；變得；變成?/p>

vt. 適合，適宜；相稱，相當(dāng)；變成；發(fā)生

become的用法

1.用作連系動詞，其后可接名詞、形容詞、過去分詞等作表語：

He became a teacher at(the age of)17.他17歲就當(dāng)了老師。

The weather became warmer.天氣變得暖和起來。

Soon the roombecame crowded.不一會兒房里就擠滿了人。

注意：其后接過去分詞時，可表示被動或結(jié)果；但表示被動時，其后一般不接by短語。比如不說：

Soon the room became crowded bystudents.

2.become是終止性動詞，因此要表示“成為…有多長時間”，英語不能將become與表示一段時間的詞或短語連用：

他成為老師有十年了。

正：He became a teacher ten years ago.

正：It’s ten years since he became a teacher.

正：He has been a teacher for ten years.

誤：He has become a teacher for ten years.

3.become 之后一般不接不定式表示“逐漸…”(此時可用come/begin＋不定式)：

正：He began[came]to like English. 他開始喜歡英語起來。

誤：He became to like English.

正：He became ill yesterday.他昨天病了。

誤：He became to be ill yesterday.

4.用于習(xí)語become of,表示“發(fā)生”、“遭遇”等(常與what連用)：

What has become of the girl?這個女孩后來怎樣了?

I don’t know what will become of me if I fail this time.要是我這次不成功，我不知我會怎么樣。