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you must dimd your highlights evry suddenly if there is a on

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/06/10 20:51:17
you must dimd your highlights evry suddenly if there is a oncoming car of a police
you must be dimd your highlights evry suddenly if there is a oncoming car of a policeyou must be prepared for workers and equipment ahead 这两句话我明白 但是为什么都加be 后接动词呢 you must prepared
用be + 动词过去时,当作形容词用,强调一种状态;如果直接用动词,强调是瞬间的动作.