湘潭mba辅导班

MBA英语语法辅导：动词不定式

　　(2)时态

　　1) 现在时：一般现在时表示的动词，有时与谓语动词表示的动作同时发生，有时发生在谓语动词的动作之后。

　　He seems to know this.

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

　　2) 完成时：表示的动作发生在谓语动词表示的动作之前。

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

　　He seems to have caught a cold.

　　3) 进行时：表示动作正在进行，与谓语动词表示的动作同时发生。

　　He seems to be eating something.

　　4) 完成进行时：

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

　　一般在情绪后加to do to do 也表将来

　　编辑本段疑问词 不定式结构疑问词who,what,which,when,where,whether,how后可接不定式构成不定式短语，在句中作主语、宾语、表 语等。如：

　　①When to leave for London has not been decided yet. (不定式在句子中做主语)

　　②Mr. Smith didn't know whether to leave or stay there. (不定式在句子中做宾语)

　　③I asked Professor Xu how to learn English well. (不定式在句子中做直接宾语)

　　④The question was where to get the medicine needed. (不定式在句子中表语)