题目内容
2．This is the second time that wehave left （leave） home．分析 这是我们第二次离开家．
解答 have left．考查固定句型．"This/It is the first/second …last time+that从句"表示"这是第…次做某事"．其中，that引导的是定语从句，且从句中要用现在完成时，表示从过去到讲话的时间为止，这是第…次做某事．即现在完成时的"动作发生在过去，一直持续到现在"．现在完成时的构成have/has+动词的过去分词．空格前为we，用have．leave的过去时、过去分词均为left．
点评 熟记固定句型的用法，并注意主谓一致．
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