本文章由春喜在線英語于2017.5.9日編輯發(fā)布

時態(tài)\語態(tài)　　　 主動　　　　　被動

一般式　　　　　 to do　　　　　　to be done

進行式　　　　　 to be doing　　

完成式　　　　　 to have done　　 to have been done

完成進行式　　　 to have been doing　　

1.現(xiàn)在時：一般現(xiàn)在時表示的動詞，有時與謂語動詞表示的動作同時發(fā)生，有時發(fā)生在謂語動詞的動作之后。

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：表示的動作發(fā)生在謂語動詞表示的動作之前。

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

He seems to have caught a cold.

3.進行時： 表示動作正在進行，與謂語動詞表示的動作同時發(fā)生。

He seems to be eating something.

4.完成進行時： 

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