it's,swim,dangerous,to,alone(.) 连词成句

Don't swim in the l___ alone.It's dangerous. it's,swim,dangerous,to,alone(.) 连词成句 Don't swim in the river a( ) .It's dangerous it's,swim,dangerous,to,alone 连词成句 --Let's( )in the river!--No,it's dangerous.是swim还是swimming You can't swim here.It's very dangerous.改为祈使句 It's dangerous to swim _____ at sea.这里应该填什么介词或副词? It's very dangerous to swim in a d____ river.中应该填什么? Look!It says,“ (not swim) in the river.It’s dangerous!” 答案是don’t swim,为什么?我觉得应是Don’t swim It's dangerous to swim here.look at the sigh.OH ,I ________notice it.didn't 还是haven't why? I find the little boy very Ainteresting Binterested Cinterest Dinterests It's too dangerous to ____(swim)alone It's very dangerous to swim at the pool 解释下为什么用to?是固定的吗? _____we swim in that river?no,you___.it's dangerous to swim therea.must,can'tb.can,may notc.may,mustn't It's danger 还是 It's dangerous 14.—— we swim in that river?——No,you .It’s dangerous to swim there.— we swim in that river?—No,you .It' s dangerous to swim there.A.Must; can't B.Can; may notC.Shall; don't D.May; mustn't I want you to give me a glass of water ,Jim(改为祈使句)( )( )a glass of water ,Jim；You’d better not swim in the river It’s dangerous(改为祈使句)( )( )in the river It’s dangerous It is dangerous for little children to swim in the river.为什么这里用to swim You ___ better ____ in the river.It's too dangerous.A.have;to swimB.had;not swimC.have;not swimimgD.had;swim