Did you buy me a pen?

你给我买了一支钢笔吗？

Yes, I bought you a pen.

是的，我给你买了一支钢笔。

Can you lend me a pen?

你能借我一支钢笔吗？

I always carry a pen in my bag.

我总是在包里带一支钢笔。

This a pen writes very smoothly.

这一支钢笔写起来很流畅。

She always carries a pen with her.

她总是随身带着一支钢笔。

He signed the contract with a pen.

他用一支钢笔签了合同。

I need a pen to write this letter.

我需要一支钢笔来写这封信。

A pen lay on the desk.

桌子上放着一支钢笔。

He had a pen in his hand.

他手里拿着一支钢笔。