首先看确认结构：
含有be动词的结构一般就be提前，句子里面谓语动词是实义动词的，就用do或者does 比如he is a doctor 改成Is he a doctor？ He is reading 就是Is he reading？ They were happy 改成Were they happy？ He likes apples改成Does he like apples？ You went to school改成Did you go to school？等等。
I have finished my work 是现在完成时，助动词have 需要提前，改成Have you finished your work？ 如果其他句子里包含情态动词，那么就是情态动词提前啦，比如I can swim改成can you swim？
抛开那些复杂的语法，通俗的说，你就记住：句中动词是原型的就用do/does题问，若句中无动词，就用am/is/are提问。
我刚学英语的时候就是这么记忆的，很管用，这种填空都不会错。
