He is in danger.这句话为什么不能用dangerous,in danger和dangerous不都是一个一

in danger 和 dangerous 有无区别? danger,dangerous,endangered,in danger区别 be in danger还是be in dangerous 英语词组区别 in danger in dangerous 求It is very dangerous swimming in the lake和It is very danger danger和dangerous的区别 dangerous和danger的区别 处于危险是in danger 还是 in dangerous? He may be dangerous to swim in the pool alone=（）he( ) danger 用die dead dying death be in danger dangerous sa in danger与dangerous 的意义及用法区别 it is ______ of him to play in the street danger还是dangerous