in the bed,in the hospital像这类词组什么时候要加the?什么时候不用?做定冠词的选择题很纳闷啊,有的要加有的不用,例如He is ill in hospital（为什么不用加the?） I caught a bad cold and had to stay in bed（为

Living In the bed in bed ,in the bed 的区别 in the bed/in bed/on the bed的区别 in bed 和on the bed on bed ,on the bed,in bed ,in the bed有什么区别最好详细一些 on the bed on bed in the bed in bed 的区别 词组区别in bed,in the bed,on the bed,on bed区别及含义,请详答, in bed ,in the bed 有何区别? in bed和in the bed有什么区别? be in bed 和be in the bed的区别~ in bed 和in the bed有什么区别? stay in bed 和stay in the bed的区别 stay in bed 和stay in the bed sleep in bed 还是sleep in the bed对? 在床上是in the bed 还是on the bed on the bed 与in the bed 的区别 lie in the bed还是lie on the bed? lie in the bed or on the bed