Mr Li _______(teach) us Maths since I _____(come) to this school.

问题描述:

Mr Li _______(teach) us Maths since I _____(come) to this school.

has taught/has been teaching, came

teached have come

后面是现在完成时 前面是过去时

我认为应该是.
Mr Li has taught (teach) us Maths since I came (come) to this school.