题目内容
6.在没有查阅书本之前,你最好不要写答案.You'd betternot write down the answers unless you look them up in the book.(unless)
分析 not write down the answers unless you look them up.
解答 答案:not write down the answers unless you look them up.本题是表示除非你查阅书本,否则最好不要写答案,用unless引导的条件状语从句,主句有情态动词had better,从句用一般现在时代替一般将来时,had better not do sth表示最好不要做某事,写答案用write down the answers,故not write down the answers,unless从句主语是you,查阅答案用look up the answers,主句以及出现了the answers,这里用them代替,需放在look up 中间,故答案是not write down the answers unless you look them up.
点评 本题是unless引导的条件状语从句,主句若是一般现在时或含有情态动词或是祈使句,从句需用一般现在时代替一般将来时.
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