she was ill bed in in the on on the 用哪个

she was ill bed in in the on on the 用哪个 on bed,on the bed,in bed,at the bed in the bed和on the bed tom'father is ill.he is in bed 还是on bed 或是in the bed抑或是at be She was ill yesterday,so she lay (为什么不用laid) in bed for the on the bed on bed in the bed in bed 的区别 on bed ,on the bed,in bed ,in the bed有什么区别 in bed /on bed /in the bed /on the bed之间有什么区别?快 He was ill in the bed yesterday 改错 The poor old man was t____ ill in bed lie in the bed还是lie on the bed? lie in the bed or on the bed