1. It's time for bed.
该睡觉了。
还能这样说：
Time to go to bed!
It's time to go to sleep.
谚语：
No man is wise at all times.
聪明一世，糊涂一时。
2. I'm not sleepy at all.
我一点也不困。
还能这样说：
I'm far from sleepy.
I'm wide awake.
谚语：
All is fair in love and war.
情场战场，各显其长。
3. I'm so sleepy.
我很困。
还能这样说：
I'm very weary.
I feel so sleepy.
4. I'm going to bed. Good night!
我要去睡觉了！晚安！
还能这样说：
I'm going to sleep. Good night!
I'm going to hit the hay. Have a nice evening!
应用解析：
be brought to bed (of a child) 临产；生（孩子）；
confined to one's bed 病例在床上；
die in one's bed 病死；寿终正寝；
keep one's bed 困病躺在床上
5. I couldn't fall asleep last night.
昨夜我失眠了。
还能这样说：
I spent a sleepless night.
I lost sleep last night.
应用解析：
fall among 偶遇；偶然陷入……之中；
fall apart 散开；土崩瓦解；
fall with laughter 忍不住大笑；
fall abreast with 与……并列，并驾齐驱
6. Good night and sweet dreams.
晚安，祝你做个好梦！
还能这样说：
Good night and pleasant dreams.
Good night and have nice dreams.
谚语：
No sweet without sweat.
不流汗就没有幸福。
7. The baby is asleep.
他睡着了。
还能这样说：
The baby has fallen asleep.
The baby is sound asleep.
应用解析：
charm sb. asleep 用魔术对某人催眠；
drop asleep 入睡；安然死去；
lay asleep 使入睡；使永眠地下；使无人过问
8. Do you need an alarm clock?
你需要闹钟吗？
还能这样说：
Do you use an alarm clock to wake up?
Is it necessary for you to use an alarm clock?
应用解析：
alarms and excursions 喧闹和忙乱；紧张和骚乱；
be alarmed at... 被……吓一跳；
be alarmed for... 放心不下，担心；
raise the alarm 发警报；
ring the alarm 敲警钟