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happen to be doing

来源：学生作业帮 编辑：神马作文网作业帮 分类：英语作业 时间：2024/09/20 23:22:42
happen to be doing
happen to be doing
happen to be doing
和happen to do
区别在于第一个强调动作在进行时,第二个不是.
例如：
He happens to be visiting the place.（强调visit当时 在进行中）
他现在正巧在访问这个地方.
I happened to meet him this morning
今天上午我正巧碰到他.
happen to do和happen to be doing happen to do和happen to be doing 的区别? happen to 未发生 happen to be doing 正在发生 happen to h happen to do or happen doing? 有没有happen to doing? seems to be doing pretend to be doing be reduced to doing be eager to doing turn out是否等于happen to be 1、我妈妈习惯星期六晚上洗衣服（be used to doing） 2、昨天我在街上碰巧遇到我老师（happen to to be done=doing?