be，become，get和turn的用法區(qū)別

1. be表示“成為”時(shí)，多用于將來時(shí)、祈使句或不定式。如：

I would like to be a bus-driver.

My younger sister wants to be a movie star.

2. become多指身份、職位等的變化，強(qiáng)調(diào)變化的過程已經(jīng)完成，后面可接名詞或形容詞。如：

Later the boy became an artist.

Her mother became angry when she heard the news.

3. get多用于口語，表示一種變化過程，強(qiáng)調(diào)的是“漸漸變得”，后常接形容詞的比較級。如：

It's getting darker and darker outside.

In winter the days get shorter.

4. turn指在顏色和性質(zhì)等方面與以前的完全不同，強(qiáng)調(diào)變化的結(jié)果。如：

Leaves turned brown in the mountains.