题目内容
13.We were about to leave while he came in.while改成when.分析 我们刚要离开这时他进来了.
解答 答案:while改成when.
分析句子结构可知,本句考查常用句型was/were about to do sth when…刚要做某事这时,使用when引导一时间状语从句;故答案为while改成when.
点评 谓语动词所表示的动作尚未发生,或尚未成为事实,则用虚拟语气

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