走了很长路后,老人一定很累了.
After a long walk,the old man must be very tired.
饭前你必须洗手.这对你的健康有好处.
You must have your hands washed before eating.It's good for your health.
这本书一定是Lucy的.瞧!她的名字在书的封面上.
This book must be Lucy's.Look!Her name's on the book cover.
---我必须今天完成这工作吗?
---Must I finish this job today?
---不,不必..
---No,you needn't.
---今天早上我必须还这本书吗?
---Must I return this book this morning?
---不,你不必.但你必须在晚饭前还.
---No,you needn't.But you must return it before supper.
.
一个大妈从我的车前穿过街道,我不得不很快停车.
I had to stop my car suddenly,for an aunty crossed the street in front of my car.
你不必担心你的儿子.他很快就会好的.
You needn't worry about your son.He'll be all right soon.
---我必须把所有单词都抄下来吗?
---Must I copy all the words?
---不,你不必.
---No,you needn't.
今天天很好.你不必带雨衣.
It's a lovely day today.You needn't take the raincoat along with you.
你最好多喝些水,Tim.这对你的健康有好处.
You'd better drink more water,Tim.It's good for your health.
在房间里你最好不要抽烟.
You'd better not smoke in the room.
外面很冷.你最好别脱掉外衣.
It's very cold outside.You'd better not take off your coat.
--- 星期六我能去看 Lucy吗,妈妈?
---Can I go to visit Lucy on Saturday,Mom?
--- 是的,可以.
---Yeah,you can.