發(fā)布時間: 2016年03月25日
大學(xué)英語四級語法大全之不定式的時態(tài)和語態(tài)
7.14 不定式的時態(tài)和語態(tài)
時態(tài)\語態(tài) 主動 被動
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: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(jìn)行時: 表示動作正在進(jìn)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(jìn)行時:
She is known to have been wreaking on the problem for many years.
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