英語六級(jí)語法:不定式的時(shí)態(tài)語態(tài)

時(shí)態(tài)\語態(tài)　　　 主動(dòng)　　　　　被動(dòng)

一般式　　　　to do　　　　   to be done

進(jìn)行式　　　　to be doing

完成式　　　　to have done　 to have been done

完成進(jìn)行式　 to have been doing

1) 現(xiàn)在時(shí)：一般現(xiàn)在時(shí)表示的動(dòng)詞，有時(shí)與謂語動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生，有時(shí)發(fā)生在謂語動(dòng)詞的動(dòng)作之后。

He seems to know this.

I hope to see you again. = I hope that I'll see you again.　我希望再見到你。

2) 完成時(shí)：表示的動(dòng)作發(fā)生在謂語動(dòng)詞表示的動(dòng)作之前。

I'm sorry to have given you so much trouble.

He seems to have caught a cold.

3) 進(jìn)行時(shí)： 表示動(dòng)作正在進(jìn)行，與謂語動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生。

He seems to be eating something.

4) 完成進(jìn)行時(shí)：

She is known to have been wreaking on the problem for many years.