what happens during lunch time ? What's happening outside?

来源:百度知道 编辑:UC知道 时间:2024/07/08 20:31:57
为什么第一句的 happens 要加s,但我知道问句里动词一定要变原形。像是 what happen during lunch time ? 第二句What's happening outside?为什么这可以用助动词is,那what happened to you?为什么不能用what did happed to you?

急急
我问:what happens during lunch time?为什么可加S,问举中动词不是要变原型?

what happens during lunch time ? 是将来时

what's happening outside? 是现在时

我不太同意一楼的,what happens during lunch time ? 是一般现在时,问中午发生了什么,是客观存在的,所以他用了一般现在时,比如说太阳早上升起了就用现在时不用过去时,因为是客观存在的事实
第二句what's happening outside?是现在进行时,用于正在发生,还有可能继续的情况中。
what happened to you?你没有分清句子结构,what代替的是你发生的那件事,比如I saw a friend.你问我刚才发生了什么,那么what代替的就是I saw a friend这一句话,作为主语,为什么要did呢?

what happen during lnch time:主语是what,是happen的动作发出者。
what happened to you:解释同上,
what's happening outside?可以说what happened outside,只是这里的's ing形式想说明的是一个时态。