We hadn’t been out for long _________ she felt sick.
A.a(chǎn)sB.whileC.a(chǎn)fterD.before
D

試題分析:as表示原因;while當……時候;時間段+ before,過了多久就……;句意:我們還沒出去多久她就生病了。before主要引導時間狀語從句,意為“先于”“…之后才”“(不多久)就…”。當主句是將來時時,從句謂語動詞須用現(xiàn)在時;當主句是一般過去時或過去完成時時,從句常用過去時。before引導的時間狀語從句不能用于否定式。
點評:本題難度適中。判斷從句中用哪個連詞,需用記住連詞的用法,在句中的作用,連詞也是高考的熱點,需要考生平時多練習。
即學即練:It may be a matter of months _____ it's ready.
A. as      B. while      C. after         D. before
解析:D。句意:要準備好可能得數(shù)月時間。
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