as if,as though的用法：
這兩個(gè)復(fù)合從屬連詞的用法和意義完全一樣,但as if 在當(dāng)代英語(yǔ)中比 as though 普通得多.
1）as if 引出的方式狀語(yǔ)從句所表示的情況是事實(shí)或具有很大可能性時(shí),通常用直陳語(yǔ)氣.名子的謂語(yǔ)我為look,seem,taste,smell,sound等.如：
It looks as if they have succeeded in the experiment.看來(lái)好像他們?cè)囼?yàn)成功了.
2) as if 引出的方式狀語(yǔ)從句所表示的情況不是事實(shí),而是主觀想象或夸大性的比喻時(shí),通常用虛擬語(yǔ)氣.從句中謂語(yǔ)動(dòng)詞一般用過(guò)去時(shí),be 動(dòng)詞常用 were,但在現(xiàn)代英語(yǔ)中也常見(jiàn)到單數(shù) was的情況.如：
The young man with long hair looks as if he were a girl.這位滿頭長(zhǎng)發(fā)的男青年看上去像個(gè)女的.
The injured man acted as if nothing had happened to him.這位受傷的男子表現(xiàn)得好像沒(méi)發(fā)生什么事一樣.
3）as if 引出的方式狀語(yǔ)從句,當(dāng)主句謂語(yǔ)是過(guò)去時(shí)態(tài)時(shí),從句謂語(yǔ)形式常常沒(méi)有什么特殊之處.如：
The lady felt as if she lost something.這位女士好像學(xué)得丟了什么東西.
He was singing as though / if he hadn't had / didn't have a care in the world.他唱著歌,好像人世間他沒(méi)有憂慮.
4）as if 引導(dǎo)的同一從句中所用的時(shí)態(tài)不同,意思往往不同.請(qǐng)比較：
* The clown looks as if he were ill.那個(gè)小丑好像害病似的.（虛擬語(yǔ)氣）
* The clown looked as if he had been ill.那個(gè)小丑過(guò)去好像生過(guò)病.（過(guò)去生過(guò)病或虛擬語(yǔ)氣）