1.have现在完成时的助动词是have(单三形式是has),
2.so 的倒装句的语序为; so +助动词(do/does/did/will/have/has/had/am/is/are/was/were)/情态动词/be动词+主语.
3
so的两个用法:1so + be / 情态动词 / 助动词 + 主语,“…也”
上下文所指不是同一个人或物. The twins are working, so am I.
I will leave tonight, and so will Peter. If you go there, so will I . (最后一句参见语法2)
又如:A: I woke up late this morning. B: So did I.
2so + 主语 + be/情态动词 / 助动词,“的确…是”上下文所指是同一个人或物.
A: We have lunch at school. B: So you do.
又如:A: Bruce can work out the problem. B: So he can. (注意以上黑体字的照应)