题目内容
3.除非你告诉我真相,否则我无法帮你.I can't help you unless you tell me the truth..分析 I can't help you unless you tell me the truth.
解答 答案:I can't help you unless you tell me the truth.分析中文句子,本句需要用unless引导的条件状语从句,表示除非…,主句是我无法帮你,用情态动词的否定式can't,加上动词原形help帮助,故I can't help you,主句含有情态动词,从句需用一般现在时代替一般将来时,主语是you.告诉我真相用tell me the truth,故答案是I can't help you unless you tell me the truth.
点评 本题是考查unless引导的条件状语从句,遵循主将从现的规则,如果主句是将来时或表示将来含义时,如果主句是祈使句,如果主句是含有情态动词那么从句通常要用一般现在时.
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