解放军文职考试：不定式的我形式

　　1) 现在式：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) 完成式：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)进行式：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)完成进行式：

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

　　一般在表示情绪的动词后加to do也表将来