4.If she ___ about his financial situation,she would have helped him out.( 。
A.knewB.had been knowing
C.had knownD.have known

分析 如果她知道他的經(jīng)濟狀況,她會幫他擺脫困境的.

解答 答案:C
分析句意可知,本句是虛擬條件句;由于主句的謂語部分使用了"would have helped",因此此處表示與過去事實相反的情況;根據(jù)時態(tài)對稱的原則,從句應(yīng)該使用過去完成時,故選C

點評 本題考查了虛擬條件句的用法.在確定了該句為虛擬條件句后,需要根據(jù)虛擬條件句中關(guān)于時態(tài)對稱的原則,選擇相應(yīng)的時態(tài);如:本題考查了當表示與過去事實相反的情況時,從句使用過去完成時,主句用would/should/could/might+have+動詞的過去分詞.

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