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can’t may not mustn’t needn’t
Yes, you may. Yeah, go aheaD. Yes, you can’t. No, you can.
first of all in your opinion more or less in all
forget forgot have forgotten had forgotten
No, you don’t No, you mustn’t No, go ahead Yes, you coulD.
needn’t; left mustn’t; leaving can’t; leave shouldn’t; leave
can’t ; went mustn’t ; left can’t ; leave may not ; going
where to where to which to the place
A:Good morning, this is Miss Li, secretary to Mr.Smith of ABC Company. ______ B:This is Zhang Hai from Beijing. ______A:I am sorry, ______. May I take a messageCan I help you;May I speak to Mr.Smith;please hold on May I speak to Mr.Smith;Can I help you;Mr.Smith is unavailable Can I help you;May I speak to Mr.Smith;Mr.Smith is unavailable May I speak to Mr.Smith;Can I help you;please hold on
fixing; going to fix; going fixing; to go to fix; to go
can’t mustn’t shouldn’t may not