what happens during lunch time What's happening outside?

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：2024/11/17 20:07:42

what happens during lunch time What's happening outside?
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
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

what happens during lunch time What's happening outside? What's happening there 请问What happens?与What happening?的区别? What's happening?He ______ (keep laughing) all the time. What's that noise?What (is happening)? what's the happens to his attention attracted to what was happening outside,the bo he didn not know what was happening outside 句型转换It's time for lunch.改为同义句It's time ( )( )lunch.What abou What's(.)your lunch He didn't know what was happening outside,为什么happening是进行时? what happens