20.You look so tired tonight.It is time you _____.A.go to sleep B.went to sleep C.go to bed D.went to bed这道题为什么选D不选B?go to sleep和go to bed怎么区别 ,这里为什么一定要用go to bed呢?
问题描述：
20.You look so tired tonight.It is time you _____.
A.go to sleep B.went to sleep C.go to bed D.went to bed
这道题为什么选D不选B?go to sleep和go to bed怎么区别 ,这里为什么一定要用go to bed呢?
答
go to sleep 是一个短暂的动作，指入睡！
go to bed 指睡觉！
答
It's time + that clause 时，that可省略，time可由high,about修饰，从句中的谓语动词有两种形式，或者用动词的过去式(be用were); 或者用shoud + 动词原形（should不能省略)。此句型为虚拟语气句型，表示“现在某人该做某事了”。
含有该事早该去做而未做，现在去做似乎都为时已晚的意思。例：
1.It's time （that）we went to bed. 我们该去睡觉了。
2.It's high time that the article were published.发表这篇文章是适时的。
3.It's time you should do cleaning. 你该去打扫卫生了。
go to bed 去睡觉
go to sleep 睡着了的
答
it's time (that) sb did sth 这是个句型
go to bed 是睡觉
go to sleep是睡着
答
go to bed 是个短语，意思是睡觉，而sleep它本身就是睡觉的意思，所以go to sleep 是一个错误的短语，画蛇添足了