1.I would've also been working.这句话有错误吗
2.对may must might提反义疑问句时，如It must have rained yesterday,didn't it?回答是Yes,it did.还是Yes,It must.
3.go come不能使用现进表示正在发生，那么，他在去学校是He is going to school还是He goes to school
4.am在反义疑问句中的否定形式是aren't，对不对。