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1、虛擬語氣 □.在英語中，隨著說話人意圖的不同，動(dòng)詞需要不同的形式，稱為語氣。英語 動(dòng)詞一般有三種語氣，艮"陳述語氣：用來陳述一個(gè)事實(shí)或提出一種看法。有肯定，否定，疑問或感嘆 等形式。 Some peple don't like music. What a fine day today! a. 祈使語氣：用來請(qǐng)求，命令或勸告等。Don^ be late again. b. 虛擬語氣：表示說話人所說的話不是事實(shí)，而是一種假想，愿望，建議等, 虛擬語氣主要用于條件從句，讓步從句或名詞性從句中，虛擬語氣通過謂適 動(dòng)詞的特殊形式（過去式）表示。 II .虛擬語氣的用法1. if主從句的虛擬

2、 、、、虛擬句 與何時(shí)諭蜃、 If條件句 主句 與過去相反 had done should/woiild/could/miQht+have done 與現(xiàn)在相反 did should/would/could/mi^ht+do 與將來相反 □ .did .were to do .should do should/would/could/mieht+do 注意事項(xiàng)： l）.if從句可以用連詞or /otherwise或without/but for引導(dǎo)的介詞短語來替代。 Without your help,we couldn't have done the wor

3、k well. 2).if從句中的if可省略，而將動(dòng)詞had/should/were提前。 Had you taken his advice ,you would not have met so many problems. 3）.有時(shí)候，if從句的動(dòng)作與主句的動(dòng)作發(fā)生的時(shí)間不一致（如一個(gè)是發(fā)生在過去, 另一個(gè)是發(fā)生在現(xiàn)在）這時(shí)，動(dòng)詞的形式要根據(jù)表示的時(shí)間來調(diào)整。 If it had not rained yesterday ,the ground would not be muddy now. 2. wish ,would rather ,as if 從句虛擬 虛擬句 與何時(shí)相

4、反 wish從句 would rather 從句 as if從句 與過去相反 had done had done had done 與現(xiàn)在相反 did did did 與將來相反 □ . did □ would/could/miQ ht+do did would/could/might+do 3. should do虛擬(should可以省略) A. 與“ 一堅(jiān)持(insist ), 二命令(order,command), 三建議 (suggest,propose,advise,recommend)四要求(demand,require,request,dc

5、sire)^, 有 關(guān)的名詞性從句。 例 1.1 suggest that you should go to hospital now. 2.It is suggested that you should go to hospital now. 3. The suggestion is that you should go to hospital now. 4. The suggestion that you should go to hospital now is good. B. It is +adj. +that sb.should do. (這類 adj.是：importa

6、nt,strange,necessary,natrual 等)It is strange that you should come on Sunday. r .The young man insisted that henothing wrong andfree. A.did;set B.had done ;should be set C.do ;be set D.had done ;must be set4.1t is (high)time that sb.did sth.(到某人干某事的時(shí)候了) It is time that you went to school now. .It's time that youhome and I'd rather youagain tomrrow. A.went;came B.are going ;will come C.go ;are going D.would go ;would come