全国大众英语测验语法——不定式的时态和语态
时态语态主动主动
通俗式 to doto be done
举行式 to be doing
完成式 to have done to have been done
完成举行式 to have been doing
1)现在时：通俗现在时默示的动词，偶尔与谓语动词默示的举措同时发作，偶尔发作在谓语动词的举措之后。
He seems to know this.
I hope to see you again. = I hope that I'll see you again.我希看再会到你。
2)完成时：默示的举措发作在谓语动词默示的举措之前。
I'm sorry to have given you so much trouble.
He seems to have caught a cold.
3)举行时：默示举措正在举行，与谓语动词默示的举措同时发作。
He seems to be eating something.
4)完成举行时：
She is known to have been wreaking on the problem for many years.

关键字：动词的时态和语态 时态和语态 各种时态的主动语态 动词时态和语态 动词时态和语态课件