istheshirtexpensive? 　　有be动词或情态动词,直接提前be动词或情态动词,动词恢复原形 　　比如youwillgotoschooltomorrow. 　　willyougotoschooltomorrow?情态动词 　　如果两者都没有,加助动词,提前,动词恢复原形. 　　yougotoschool. 　　doyougotoschool?