have to的否定形式和疑问句形式分别是?
问题描述:
have to的否定形式和疑问句形式分别是?
答
don't have to
do you have to do?
答
否定形式:加助动词 don't have to(主语为第三人称单数要变成doesn't have to)
疑问句形式:Do..have to(主语为第三人称单数要变成Does..have to)