have to 的用法
已有 309 次阅读 字数(257) 2014/6/7 14:18:22
have to表示客观需要做的事情，意思是“必须”、“不得不”。后跟动词原形，有人称、时态和数的变化。
A、 肯定式：have to + 动词原形1、 I have to tidy my room.我得整理房间。2、 She has to help with the washing.她得帮忙洗衣服。B、 否定式：don't (doesn't) + haveto + 动词原形1、You don't have to go if you don't want to.如果你不想去，你就不必去。2、He doesn't have to stay at home all day. 他不必整天呆在家里。