you don't have to buy a gift一句中have to做情态动词吗?buy作为实意动词,那么have to是情态动词吗?如果是的话为什么是don't have to而不是haven't to

don't make trouble if you don't have to You don't have to love me you don't have to be mean you don't have to go 歌词 选择方框里词的适当形式填空词：outside,dangerous,come,open,after,can't,stop,go home,arrive,have to,get to,don't have to,in front of,don't,put作文；Don't______ late for the bus.You have to______ the bus stop five minutes before the bu don.,t have to You don't have to say you love me 歌词 I don't want to lose you also don't want to have you if you don't want to ,then you don't have to believe you don t have to pretend to be you don t have to pretend to be you don't have to be dirty to be Love means you don't have to say sorry, Love means you don't have to say sorry,ever Love means you don't have to say sorry,ever. love means you don't have to say sorry,ever. love medns you don't have to say sorry Don't ever wanna have to go and give you