Bob can't be at school 为什么要用”be“

Bob can't be at school 为什么要用”be“ Bob must be at home,________?A.mustn't he B.can't he C.isn't he D.doesn't he 选哪一个?为什么? 用适当介词、连词或副词填空The teacher is mad ____what the students did to himAre you disappointed___________your son?You can't learn anything_______soap operasHe is working _________ a homework projectHe will be a maths teacher at a scho he can't be at school反义疑问句he can't be at school.反义疑问句 can't be at home可以转换成can't stay at home吗 He can't be at home.为什么can't后要加be? He can't be at home.为什么在at前面有be?什么情况下要加Be? Today is Wednesday.He _______be at home.He ______ be at school.A.can’t,can B.can’t,must C.mustn’t,must D.mustn’t,can 根据句子意思用must,might,could或cant填空根据句子意思用must,might,could或can’t填空 1The white ruler belong to Lucy.Hers is red.2.I can’t find my keys.They be still at home.3.The exercise book belong to Bob.It has his name on it English之保持原意1.Shall I have a word with Bob?(保持原意）Shall I _____ ______Bob?2.Your froengs will be surprised to see you at the party.(保持原意)Your friends will_____you at the party____ ____3.The little boy can`t read.The little This book ( ) Bob's.Look!That's his name.This book ( ) Bob's.Look!That's his name.A.may beB.must beC.can't beD.mustn't be说明原因 Dear Dr Know, I’m not happy. 答案Dear Dr Know, I’m not happy. I have too __1_ rules in my family. I have to __2___ at 6:00 every morning. I can’t __3__ my friends after school __4__I have to __5__my dog for a walk. I can’t watch TV on scho There can't be anyone at home,___?A.is thereB.can therewhy we choose A If you can't be kind,at least have the decency to be vague Bob works hard.he t to be a good student Bob doesn't be late for school.(改错） Don't be so .Bob .[fool]怎么填 六年级下学期英语第一课B2原文是：Bob:hello?Aunt Molly:hello,bob.this is your aunt molly.bob:hi,aunt molly.how are you?aunt molly:i'm fine,thanks.tell me,are your mum and dad at home?bob:no,i'm sorry.they aren't here.can i take message?a