shouldn‘t
一般情况下前面有must,should附加疑问句仍用must should加主语,但是must表推测时,附加疑问句不用must,而要根据情态动词后面的动词采用相应的形式,如:He must be good at maths , isn't he?
shouldn‘t
一般情况下前面有must,should附加疑问句仍用must should加主语,但是must表推测时,附加疑问句不用must,而要根据情态动词后面的动词采用相应的形式,如:He must be good at maths , isn't he?