Miss Shan has taught us History since I ()(come) to this school.
问题描述：
Miss Shan has taught us History since I ()(come) to this school.
答
Miss Shan has taught us History since I (came)(come) to this school
答
came
since 所带的从句用一般过去时
答
came
一般过去时就行,因为“来”是发生在过去,“教”发生在“来”之后并一直持续到现在.
答
came