be，become，get和turn的用法區(qū)別

1. be表示“成爲”時，多用於將來時、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，強調變化的過程已經(jīng)完成，後麪可接名詞或形容詞。如：

Later the boy became an artist.

Her mother became angry when she heard the news.

3. get多用於口語，表示一種變化過程，強調的是“漸漸變得”，後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指在顔色和性質等方麪與以前的完全不同，強調變化的結果。如：

Leaves turned brown in the mountains.