一、 have to 的陳述句形式

　　A、 肯定式：have to + 動(dòng)詞原形

　　1、 I have to tidy my room.我得整理房間。

　　2、 She has to help with the washing.她得幫忙洗衣服。

　　B、 否定式：don't (doesn't) + haveto + 動(dòng)詞原形

　　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。

　　二、have to 的一般疑問(wèn)句形式及簡(jiǎn)略答語(yǔ)

　　have to的一般疑問(wèn)形式必須借助助動(dòng)詞 do 或 does：

　　1、 Do you have to look after your sister？ 你得照看你妹妹么？

　　Yes, I do./ No, I don't. 是的，我得照看。/不，我不必照看。

　　2、 Does Jim have to do his homework? 吉姆必須做家庭作業(yè)么？

　　Yes, he does. / No, he doesn't. 是，他必須做。/不，他不必做。

　　三、have to 的特殊疑問(wèn)句形式

　　1、 What do you have to do on Sundays?在星期天你得干什么？

　　2、 Why does she have to move to Paris?她為什么得遷往巴黎？

　　3、 Where do they have to work?他們必須在哪里工作？