(2)She tried to prevent ，but he still went.

　她试图阻止他去，但是他不听劝，还是去了。

2、exist vi.存在；生活，生存(live) existence n.存在；生活，生活方式

exist in存在于......之中 exist on靠......为生 in existence存在

come into existence产生；成立；出现，开始存在

【易错提示】exist是不及物动词，不用于被动语态，也不用于进行时。

(1)用exist短语及其适当形式填空

① It was impossible for them to exist such a small income.

② Unfortunately，they only exist the fancy world.

③ No one knows when such a custom first came existence.

(2)There has been no________evidence to prove the________of life on other planets.

　A．convincing；existence B．convinced；existence

　C．convinced；exist D．convincing；exist

3、remain v．留下，遗留；保持不变，一直是

1．指某事"尚待、有待于以后被处置"，后面常接不定式的被动形式，表示主语是不定式的承受者。此时它有两个固定句型如下： sth./sb.remains to be ＋过去分词；

It remains to be seen ＋ whether引导的主语从句

2.用作系动词，意为"仍然；依旧；留；住；待"，后面可接名词、代词、形容词、介词短语、分词作表语。尤其是其后跟动词的v.­ed形式，相当于形容词，指某人或某事物仍保持某种状态。

3.remaining adj.剩余的，剩下的

(1)用所给动词的适当形式填空

① After the earthquake, very little (remain)of the city of Tangshan.

② This problem remains (solve)．

③ Please remain (seat)until the plane has come to a complete stop.

④ He bought himself a gift with the (remain) money.

(2)The fact ________ that we are still lagging behind the other classes in maths.

　A．is remained B．is remaining C．remains D．remained

4、in one's turn 轮到某人；接着