動(dòng)詞不定式F

6. 不定式的時(shí)態(tài)和語(yǔ)態(tài) 

時(shí)態(tài)“語(yǔ)態(tài)　　　 主動(dòng)　　　被動(dòng) 
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(shí)：一般現(xiàn)在時(shí)表示的動(dòng)詞，有時(shí)與謂語(yǔ)動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生，有時(shí)發(fā)生在謂語(yǔ)動(dòng)詞的動(dòng)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(jiàn)到你。
2) 完成時(shí)：表示的動(dòng)作發(fā)生在謂語(yǔ)動(dòng)詞表示的動(dòng)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(shí)： 表示動(dòng)作正在進(jìn)行，與謂語(yǔ)動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生。 
　He seems to be eating something. 

4) 完成進(jìn)行時(shí)：  
　She is known to have been wreaking on the problem for many years.