二、before引导的状语从句
尤其要注意“it+be+一段时间+before?”这一句型。如： 42结构：4 2
1. The field research will take Joan and Paul about five months; it will be a
long time ______ we meet them again. (安徽卷)
A. after B. before C. since D. when
2. He was told that it would be at least three more months ______ he could
recover and return to work. (江西卷) A. when
B. before C. since D. that
【解析】两道题均before。第1题涉及的句式为：It will be a long time before?，意思是“要过很久才
会??”；第2题涉及的句式为：it was some time before?，意思是“在??之前过了一段时间”，通常可转译为“要过一段时间才会??”。 Sally
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三、while引导的状语
