高考英語語法知識點：虛擬語氣

　　I．要點

　　表示說的話不是事實，或者是不可能發(fā)生的情況，而是一種愿望、建議或與事實相反的假設(shè)等。一般常用于正式的書面語中。

　�。薄⑻摂M語氣的構(gòu)成

　　注：如果條件從句謂語動詞包含有were或had, should, could有時可將if省去, 但要倒裝。如：

　　Had you (If you had) invited us, we would have come to your party.

　�。�、虛擬語氣在各種從句的應(yīng)用

　�。ǎ保┰谥髡Z從句中用來表示驚奇、惋惜、理應(yīng)如此等，其謂語形式是"should(可省) ＋動詞原形"，常用于以下三種句型中。

　　句型一：It is necessary (important, natural, strange, etc) that…

　　句型二：It is a pity (a shame, no wonder, etc) that…

　　句型三：It is suggested (requested, proposed, desired, etc) that…

　　如：It is strange that he (should) have done that.

　　It is a pity that he (should) be so careless.

　　It is requested that we (should) be so careless.

　�。ǎ玻┰谫e語從句中用于suggest, propose, move, insist, desire, demand, request, order, command等動詞后的賓語從句中，表間接的命令和建議。其謂語形式是"(should)+動詞原形"。如：

　　I suggest that we (should) go swimming.

　�。ǎ常┰诒碚Z從句中，表示間接的命令，要求、請求、建議、決定等，主句中的主語通常是suggestion, proposal, request, orders, idea等。從句謂語形式是"(should)＋動詞原形"。如：

　　His suggestion is that we (should) leave at once.

　　（４）在同位語從句中，謂語形式是"(should)＋動詞原形"。如：

　　We received order that the work be done at once.

　　（５）在It is time that…句型中，其謂語動詞形式是"動詞的過去式"或

　　"should ＋動詞原形",should不可省。如：

　　It's time that we went ( should ）go to school.

　　II．例題

　　例１We had hoped that he ____ longer.

　　A stays B have stayed C stayed D would stay

　　解析：該題正確答案為Ｄ。had hoped表示"本希望"，同樣用法的動詞還有think, expect等，后面的句子需用虛擬語氣

　　例２"Mary wants to see you today".

　　"I would rather she ____ tomorrow than today."

　　A comes B came C should come D will come

　　解析：該題正確答案為Ｂ。would rather后面的從句需用虛擬語氣，用動詞過去時表示。

　　例３Had she been older, she ____ it better.

　　A had done B might have done

　　C might do D would do

　　解析：Had she been older = If she had been old. 故該題正確答案為Ｂ。

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