语法will后面能跟have吗

will 和have都是多词性的词，will可以是助动词，也可以是名词，表意愿。have也可以是助动词，出现在时态表达中，但也可以做实义动词，并表示有、使、让的意思。两种情况下will可以后面跟have，一种是在将来完成时中，will和have一起连用，都是助动词。另外一种是一般将来时，will是表将来的助动词,have是实义动词。he will have finished his house a month later. he will have a new life.

will和have能同时出现在同一个句子中吗?

will have也是正确的.

I will have to go with him.我得跟他一起去.

这是have to 前加will,表示将来.

Tomorrow we will have an exam.

Next year, I will have stayed in the school for three years.将来完成时