itraintomorrow,themeetingwouldbeputoff.A.Should ...
問題詳情:
it rain tomorrow, the meeting would be put off.
A.Should B.Would
C.Could D.Must
【回答】
A
【解析】
本題考查與將來事實相反的虛擬語氣,故從句用should + v原形。句意:如果明天下雨,會議將會被推遲。此處是if引導的非真實條件句,如果把if省略,則將情態動詞should提到主語的前面。故選A。
【點睛】
if 的虛擬語氣講解
1.對現在情況的假設:表示説話時不存在或與事實相反的情況.形式:If+主語+did,主語+should/ would /could +do.例句:If you knew english well,you would be able to talk with foreigners freely.
2.對過去情況的假設:表示與過去事實相反的情況.形式:if+主語+had done,主語+should/would /could+have done.例句:if i had not studied hard ,i might have failed in the exam.(事實是我通過考試了)
3.對將來情況的假設:表示將來實現可能*不大的情況.形式:if+主語+did/were to do /should do,主語+should /would /could do.例句:if he should change his mind ,what would we do?
if的省略:在正式文體中,有時可把虛擬條件句中的連詞if省去,這時從句需要採用倒裝語序,即:將were,had,should等助動詞提到主語前面,主句不做任何變化.例句:should it rain tomorrow,we would staly at home.
錯綜時間:所謂錯綜時間是指主句和從句的動作不是發生在同一時間.這時,需要根據意思選用表示不同時間的虛擬語氣形式.例句:if i were you ,i would have taken his advice.(從句表示現在時間,主句表示過去時間),我要是你,就聽他的忠告了。
知識點:虛擬語氣與情態動詞
題型:選擇題