If I _______ you , I _______ do that .
A.was , wouldB.were ; wouldn’tC.a(chǎn)m , won’tD.were , won’t
B

試題分析:虛擬語氣是一種特殊的動詞形式,用來表示說話人所說的話并不是事實,而是一種假設、愿望、懷疑或推測。判斷是真實條件句還是非真實條件句。只有在非真實條件句中才使用虛擬語氣。通過句子意思,看假設的條件是否能夠實現(xiàn),能夠實現(xiàn)是真實條件句,不能使用虛擬語氣;假設的條件不能實現(xiàn)則是非真實條件句,要用虛擬語氣.判斷這個假設是與哪個事實相反。
1、與現(xiàn)在事實相反
若與現(xiàn)在事實相反,條件從句的謂語用過去式(be通常用were),主句謂語用“should (would, could, might)+動詞原形”
2、與過去事實相反
若與過去事實相反,條件從句的謂語用過去完成時(had+過去分詞),主句謂語用“should (would, could, might)+have+過去分詞”
3、與將來事實相反
若與將來事實相反,條件從句的謂語用過去式(be通常用were),主句謂語用“should (would, could, might)+動詞原形”:
句意:如果我是你,我不會那樣做。結合語境可知本句描述的是與現(xiàn)在相反的事實,故從句中用一般過去時態(tài),主句中用過去將來時態(tài),選B。
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