I must go to the airport to be in time for the flight.I must go to the airport to be in time for the flight.为什么这句要用 to be 可不可以不用,直接I must go to the airport in time for the flight.用和不用有什么区别?

I must go to the baker’s I must go to the chemist's for some medicine. I must go to the grocer's.改为间接引语. Before I go to bed I take a turn in the open air. Before I go to bed I take a turn in the open air. I will go to Harbin for my summer vacation.What about you?—I haven’t decided where ___.A.go B.went C.going D.to go 2..Something must be done ____people____pollluting the air A to stop ,to B to stop,from C for stopping,to D of stoppin must i go to the doctor's?No yuoneedn't ,mustn't ,can't ,must My students asked me-----------I would go to Beijing by air the next year i must go to school now. I must to go now.翻译 The weather of these days is really bad.It’s foggy and there is haze in the air.So,we can’t see the things very far.Every morning,when I pull back the curtain,I only can see the building dozens miles away.When I go to school,I must be very carefu I have a headache so I must go to the（doctor） I gotta go.I have to /must go now i must go to the chemist's to get some medicine同义句 选择 I must go _______.It's time to go ________.I must go _______.It's time to go ________.A.to home;bed B.home;to bed C.to my home;bed D.the home;to bed I will go to Nanjing by plane/air(同义句) We must go to the cinema we must go to the cinema now