as if 從句.ppt

1、一、as if 從句的作用,1 在look, seem 等系動(dòng)詞后引導(dǎo)表語(yǔ)從句。如： She looks as if she were ten years younger It seems as if our team is going to win,2 引導(dǎo)方式狀語(yǔ)從句。 She loves the boy as if she were his mother The child talked to us as if he were a grown-up,二、as if 還可用于省略句中 如果as if 引導(dǎo)的從句是“主語(yǔ)系動(dòng)詞”結(jié)構(gòu)，可省略主語(yǔ)和系動(dòng)詞，這樣as if 后就只剩下名詞、不定式

2、、形容詞（短語(yǔ)）、介詞短語(yǔ)或分詞。 He speaks English as if (he were) an Englishman Tom raised his hands as if (he was going) to say something She left the room hurriedly as if （she was）angry,三、as if 從句的語(yǔ)氣及時(shí)態(tài),1 as if 從句用陳述語(yǔ)氣的情況。 當(dāng)說(shuō)話者認(rèn)為句子所述的是真實(shí)的或極有可能發(fā)生或存在的事實(shí)時(shí)。 He talks as if he is drunk There are clouds in the sky. It

3、 looks as if it is going to rain.,2 as if 從句用虛擬語(yǔ)氣的情況。 當(dāng)說(shuō)話人認(rèn)為句子所述的是不真實(shí)的或極少有可能發(fā)生或存在的情況時(shí)。從句虛擬語(yǔ)氣動(dòng)詞時(shí)態(tài)的形式如下：,（1）如果從句表示與現(xiàn)在事實(shí)相反，謂語(yǔ)動(dòng)詞用一般過去時(shí)。 She speaks to me as if she knew me. He talks as if he knew where she was,（2）從句表示與過去事實(shí)相反，謂語(yǔ)動(dòng)詞用“had過去分詞”。 He talks about Rome as if he had been there before The girl listened as if she had been turned to stone,（3）從句表示與將來(lái)事實(shí)相反，謂語(yǔ)動(dòng)詞用“wouldcouldmight動(dòng)詞原形”。 He stood up