He must be at home.为什么用be?

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• 问一道很简单的英文应用题An insurance salesperson,who sold 260 policies last year,has averaged 4 policies per week for the first 8 months of this year.How many policies per week must he average in the remaining weeks in order to equal his performance for last year?由于告诉的是前8个月,而问又是星期为单位,每个月几个星期又不固定,怎么换算能够达到最高效率?
• this is a new world to which he must adjust himself 他必须调整自己适应这个新世界 to which是什么用法
• I must finish this letter before _going___ home. 为什么用going不用go
• Do you think he looks like somebody from our school为疑问句,为什么用somebody
• There being no bus,he had to walk home.为什么用there be?
• He must stay at home.句中的stay要加s吗?为什么?
• 英语情态动词和助词的练习选择填空1.Although he tried , he ___ not make it. A.should B.would C.might D.could2.The last bus has left . We ___ walk home. A.must B.could C.have to D.can3.-___ I have a word with your mother? - Sure. A.Need B.Must C.May D.Should4.I ___ speak a little English when I was four. A.can B.could C.may D.must5.I think I ___ speak English very well when I finish my lessons. A.could B.shall be able to
• 改错,请把改正后的句子写出来(1)The students must listened to the teacher carefully.(2)We mustn't talk loud at the cinema.(3)They saw a fire and shouted help.(4)He lost his wallet in his way home.(5)Now,there are three subwaies in our city.(6)There are lot of cars and people,too.英语五年级下册每日一练第四课第六题的
• If you do decide to make an application, what you do is send it directly tom这句话感觉语法错误 is send 两个动词怎么一起用了呢?不定式作表语时,如主语部分含有实义动词do,且句子的时态为一般现在时或一般过去时(多为is或was),不定式可以带to也可不带to (1)What we must do now is(to) find anther person to help us. (2)All he could do was (to) rush into the room. 如句子的动词时态不是一般现在时或一般过去时,作表语的动词不定式一般要带to (1)She knew that all she would have to do would be to stop crying.
• It must be John.Who else would _____ he does?A.work hard as B.be working as hard as C.It must be John.Who else would _____ he does?A.work hard as B.be working as hard as C.do harder work than D.work harder than 为嘛答案是b而不是d
• kitty always dances for two hours.（改为一般疑问句并作肯定回答）
• Here -- some students' homework on the floor.要填哪个Be动词