(4)表示必须和需要:must, have to,need 1)mus表示说话人认为“必须”;否定回答 时用 needn?t“不必”。 You must be here at nine o'clock o Must you go soon? No, I neednt go yet ●2) have to表示他人或客观情况要求“必须”。 o I have to be back at school by eight. I have a lot of work to do tonight We don ' t have to wear uniforms in school ●口语中常用 have got to表示“必须 oI have got to leave now. i have a meeting in ten minutes
（4）表示必须和需要：must, have to, need ⚫ 1）must表示说话人认为“必须”；否定回答 时用needn’t “不必” 。 ⚫ You must be here at nine o’clock. ⚫ Must you go soon? No, I needn’t go yet. ⚫ 2) have to 表示他人或客观情况要求“必须” 。 ⚫ I have to be back at school by eight. I have a lot of work to do tonight. ⚫ We don’t have to wear uniforms in school. ⚫ ⚫ 口语中常用have got to 表示“必须” 。 ⚫ I have got to leave now. I have a meeting in ten minutes
3)need表示动作者“需要”、“有必 要”,用于否定句或疑问句;肯定回答 用must,否定回答用 needn't。 Need he go now? Yes, he must. No he neednt need常用作实义动词。 o You need to learn the value of time o You didn 't need to tell him the news ● Does she need to go
⚫ 3) need 表示动作者“需要” 、 “有必 要” ，用于否定句或疑问句；肯定回答 用must，否定回答用needn’t。 ⚫ Need he go now? Yes, he must. No he needn’t. ⚫ ⚫ need 常用作实义动词。 ⚫ You need to learn the value of time. ⚫ You didn’t need to tell him the news. ⚫ Does she need to go? ⚫