写了封信

我给我父亲写了封信请你看完以后，帮我寄给他

I wrote a letter to my father. Please read it and mail it to him for me.

— 色‧戒 (2007)

我写了封信，叫他早点回。

I wrote him a letter asking him to come back soon.

他给我写了封信。

He wrote me a letter.

我给里昂音乐学院写了封信

I wrote a letter to the Lyon Conservatory of Music.

— 放牛班的春天 (2004)