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Frank was about to leave when he noticed a letter lying on t

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/04 11:17:34
Frank was about to leave when he noticed a letter lying on the floor.
这话是什么时态,什么结构,
这是个复合句,
主句Frank was about to leave 为过去将来时(be about to do表示“将要做某事”),
从句when he noticed a letter lying on the floor为when 引导的时间状语从句.
整句话的意思是:
弗兰克正要离开,这时他发现地上有一封信.