Insomnia 失眠（癥）
Sarah suffers from insomnia.
Sarah飽受失眠困擾。
I had insomnia last night.
我昨晚失眠了。

Oversleep 睡過頭；睡得太久
I'm sorry I'm late. I overslept this morning.
對不起，我遲到了。我今天早上睡過頭了。
You really need to stop oversleeping or it will affect your job.
如果會影響到你的工作，你就真的不能再睡懶覺了。

Morning person 早起的人
I'm really not a morning person. I hate getting up early.
我真的不是早起的人。我討厭早起。

Stay up 睡得晚，熬夜
Mom, can I stay up and watch the movie?
媽媽，我可以晚點睡，看電影嗎？
I had to stay up all night to finish my report.
我得熬通宵寫報告了。
Don't stay up late. You have school in the morning.
別熬夜。你早上要上學。

Sleep in 遲起；睡過頭；睡懶覺
I can't wait for the weekend so that I can sleep in.
我等不及到周末了，周末我可以睡懶覺。
Sleeping in is my favorite thing to do on a day off.
睡懶覺是我放假的時候最喜歡做的事情。
I had to hurry this morning because I slept in.
我今天早上特別匆忙，因為我睡過頭了。

Heavy/Light sleeper 睡得很沉的人/睡眠很輕的人
Sleep like a log 睡得很沉
Nothing wakes him. He sleeps like a log.
什么都叫不醒他。他睡得很沉。

Sleepless 睡不著；失眠
I'm so tired. I had several sleepless nights this week.
我太累了。這個星期，我失眠好幾晚了。

Hit the sack 去睡覺，就寢
Alright, kids bedtime. Time to hit the sack.
好了，孩子們，睡覺時間（到了）。要去睡覺了。

Get some Zs -- Sleep (America and Canada only) 睡覺
Man, I tired. I really need to get some Zs.
哥們兒，我累了。我真的要睡覺了。
I feel good. I got plenty of Zs last night.
我現在狀態很好。我昨晚睡眠充足。