1. I'd like to take tomorrow off if it's all right with you.
我明天想请假，可以吗？
还能这样说：
I want to ask for a leave tomorrow, is it OK?
Is it convenient for me to ask for a leave tomorrow?
谚语：
Tomorrow never comes.
莫依赖明天。

2. May I have one day off?
我能请一天假吗？
还能这样说：
Would it be possible for me to take one day off?
I'm asking for a day's leave.
谚语：
The devil knows many things because he is old.
老马识途。

3. I want to ask for sick leave.
我想请病假。
还能这样说：
I'll have to ask for sick leave.
I ask for a sick leave.
应用解析：
a sick joke 令人害怕的玩笑；
a sick thought 不健康的思想

4. I will submit it for your approval.
我会交给你签字批准。
还能这样说：
I will give it to you to approve it.
I will hand it to you in that you can pass it.
应用解析：
submit oneself to 甘受，服从；
submit willingly 心悦诚服；
submit to 服从于，屈从于，把……提交给；向……提出……