1、Must I clean the dining room at once? 我必须马上打扫膳厅吗?Yes, you must. 是的。No, you needn't.不必马上打扫。(No, you don't have to.)2、Must I go to school? 我今天必须去上学吗?Yes,you must. 是的,必须的。No,you needn't. 不必了(在家呆着吧)。3...
we must listen to the teacher carefully.we mustn't talk with each other at class.
must keep the law.人人都要守法。The last train has gone.We’ll have to walk home.最后一班车已经开了,我们得走回家了。从时态方面看,must 只有现在时一种形式(在宾语从句中可以表示过去),而 have to 则有多种时态形式。如(www.hxen.com):
I must drink water everyday.我必须每天喝水
1That must have been hairy!那一定很惊险!2. Your dress must have been expensive.你的衣服一定很贵。3. He must have been very thirsty.它一定是渴极了。4. It must have been about dawn.那时候一定是天将黎明时。5. There must have been some mistake.很可能出了差错。6. ...