雖然in bed 的意思和stay in bed 的意思一樣,是臥床的意思,但是,in bed 是介詞,stay in bed 有動(dòng)詞
我們不能說we must in bed(因?yàn)闆]有動(dòng)詞）
我們只能用we must stay in bed (有了stay 這個(gè)動(dòng)詞）in the bed ?? in bed????????in the bed??in bed?????????????in the bed ??????????????????in bed ?????????????????go to school ???go to the school ??У??????????????????????飩????at bed??????at bed???????at bed ??????????????????????????????????????at the bed