you needn't swim in the river .it is dangerous错在哪啊?

you needn't swim in the river .it is dangerous错在哪啊? the river is dangerous.you ___ swim in it .A.can't B.mustn't C.couldn't D.needn't can't,that,you,in,river,swim 1.Can you swim in the river?—No,I___.2.May I go swimming now —No,you___.3.____I finish the work today?—No,you needn't. what kind of pool can't you swim in? You can't swim in the lake.改为否定祈使句. You can't swim in this river同义句如题. you mustn't swim in deeper water如何回答? You mustn't swim in the sea改为祈使句 You can't ___ (swim) in the lake 填空 Must we hand in our homework now?No,you needn't.解释一下为什么要用needn't. Don't swim in the river 改写同义句Don't swim in the river→You ( ) （ ）to swim in the river在（ ）里填空 I needn't a photo to remember you .Because you never leave in my I needn't a photo to remember you .Because you never leave in my heart, I needn't a photo to remember you .Because you never leave in my hear 是什么意思? Don't swim in the Mike ,you don't_____hand in your pencil-box todayA.needn't B.don't need C.needn't to D.not need to 选哪个? you （） park your car in front of the school gateA.needn't B.needn't to C.don't need(请注明原因)