在他生日的时候我要送给他一支钢笔。

I want to give him a pen on his birthday.

youdao

只有我（不是其他人）给他一支钢笔。

Only I gave a pen to him.

youdao

他递给我一支钢笔，我就用那支钢笔给他写下了我的地址。

He handed me a pen, which I wrote down my address with for him.

youdao

他递给我一支钢笔，我就用那支钢笔给他写下了我的地址。

He handed me a pen, which I wrote down my address with for him.

youdao