有个句子I mustn't have too much potato because I'm on a diet.potato不是可数名词吗?

有没有这个说法:I mustn't have been a doctor.可以说mustn't`````吗? 有个句子I mustn't have too much potato because I'm on a diet.potato不是可数名词吗? May I finish the work this afternoon?No,you __ You __ finish it now请填空 A mustn*t needn*t B needn*t don*t have toC needn*t mustn*t D mustn*t mustn*t I am feeling sick.I (mustn't have eaten) so much chocolate为啥这填mustn't have eaten 不填shouldn't have eaten thanks must 和 have to 有什么不一样?mustn't 和 don't have有什么不一样? --Catherine,i have cleaned the room for you.--Thanks.you____it.I could manage it myselfA.needn't doB.needn't have doneC.mustn't doD.shouldn't have done选哪个（B和C有什么区别?有B这种说法吗?）我上面写错了个地方！我是想问B mustn't have done和can't have done的区别最好有例子 英语作文、 要求如下 您可以参考、关于 must ,mustn't请写出5个 must 句子 mustn't句子 句子最好与班级规章制度有关 mustn't needn't I mustn't take any aspirins 翻译 Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mus...Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mustn’t do D.shouldn’t have done中B和D有什么区别?Catherine,I have You____take you raincoat.I'm sure it won't rain A、don't have to B、can't C、shouldn't D、mustn't They _____ about it,I'm sure they didn't know.A.must have knowB.mustn't knowC.can't have knownD.can't know I was really anxious about you.You _______ home without a word next timeA.mustn’t leaveB.shouldn’t have leftC.couldn’t have leftD.needn’t leave May l have chocolate ---No,youcan't may not mustn't 哪一个?顺便问一下有mayn't么 -May I watch TV for a while?-No,you ______.You have to do homework.a.shouldn't b.needn't c.mustn't d.won't (为什么不用shouldn't）?而用mustn't 1.I must have done something wrong,___?A.hasn't I B.haven't I C.mustn't I D.didn't I2.I must have done something wrong yesterday,___?A.hasn't I B.haven't I C.mustn't I D.didn't I MUst I finish this novel this morning?No,you ____A mustn'tB might notC don't have toD can't