I have a favor to request of you.

我有事求助于你。

May I request a favour of you?

请您帮一下忙好吗?

I have to request permission of her parents.

我得请求她父母亲同意。

We request the honour of your company.

敬请光临。

They requested the pleasure of him in company at tea the following afternoon.

他们邀请他第二天下午到他们那里喝茶。

We request the favour of a reply at your earliest convenience.

请方便时尽早给予答复。

I requested of him that he should go away.

我请求他离开。

The teaching staff requested of the headmaster that he should reconsider his decision.

全体教师要求校长重新考虑自己的决定。