they have school trip is September 4th.哪里错了?

题目

they have school trip is September 4th.哪里错了?
如果是两动词不能连用,have和is中间不是还有school trip么?

答案

记住,一句话中只可以有一个动词.have 和is不可以同时存在一个句子中,无论中间有什么.这句话可以把is 改为on