含蓄條件句是指句中沒有明顯的虛擬條件句，而是利用其他手段來暗示存在虛擬條件。但是這類隱含式虛擬條件句往往都可以轉化為if引導的條件句。常來表示含蓄虛擬條件的手段有：
^5~x*=_ �。�1）介詞或介詞短語，如but for, but that, without, in case of, under more favorable condition等。
8| i<4> the leadership of the party, we could not be living a happy today.=If there hadn't been the leadership of the party, we could not be living a happy today.
8#A4 B2 A. In spite of B. But for C. Because of D. As for 答案選B。
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But that she was afraid, she would have said no.
.% W.uF^ �。�2）連詞，如：so that, unless, in case, supposing, lest, provided（倘若……），for fear that（唯恐），in order that, on condition that, if only（要是……就好了）等。
oo]P}ra She listened carefully in order that she might discover exactly what he wanted.=if she listened carefully ,she might discover exactly what he wanted.
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3p If only I had more money, I could buy a car.
K9ih(fh) �。ㄗⅲ簂est, for fear that 和 in case 引起的從句中謂語動詞多用should+動詞原形，但可以不用虛擬語氣，而用動詞的陳述語氣形式。）例如：
GYJ j$' The foreign teacher spoke slowly in case we misunderstood him. 這位外籍教師說得很慢以免我們聽不懂。
X[w]aJnAr Care must be taken in using this method lest overflow should occur.在使用此法時要小心謹慎，以免會發生溢流現象。
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