so he must stay in bed for a week因此他必须卧床一周 这句话he是第三人称为什么动词stay没有换成stays,还有就是解释一下for在这句中的用法

so he must stay in bed for a week.句中stay为什么不加s The light in his room is on now ,so he ______at homemust be 还是must stay? his h() hurts. so he must stay in bed. the child has a bad c() dave has a flu .so he must stay in bed .改错 He has a bad cold,Mr.Williams,so he must stay in bed for a weekso he must stay in bed for a week其中的stay为什么不加S He is ______(terrible) ill.He must stay in bed. How____________________?He must stay in bed for five days. he must stay in bad for a week 怎么翻译 tom is till .he must stay ( ) for tow days a.in zhe bed b.in bed c.on bed He will have to stay in hospital.That’s what he____a has done b must do c must be doing d must have done为什么C不对呢 he must stay in bed.he 是第三人称 为何 must 或这 stay 不用加s呢? so he must stay in bed for a week因此他必须卧床一周 这句话he是第三人称为什么动词stay没有换成stays,还有就是解释一下for在这句中的用法 must stay in bed可以说成stay he left yesterday,so he ()in beijing .A.may arrive B.may have arrived C.must arrive D.arrived Joe only wanted a mobile phone （ ）he could stay in touch with others A so B that 理由 in bed 是同样的道理吗?但是He must stay in bed.怎么翻译呢? he must stay in bed 请问 in后面加the 有什么区别吗? he—stay in bed for weeks. A,has to. B,had tohe—stay in bed for weeks.A,has to. B,had to. C,must D,can选什么?