I consider it my duty to write a letter to thank you.

我认为给你写封信表达感谢是我的责任。

金山词霸

The old man asked me to write a letter for him.

那位老人要我替他写封信.

《现代汉英综合大词典》

We could write a letter to the headmaster.

我们不妨给校长写封信.

《简明英汉词典》

I'll write a letter during the break.

趁这个空当儿,我写封信.

《现代汉英综合大词典》

I've got to write a letter to him.

我得给他写封信.

《现代英汉综合大词典》

If I write a letter, would you post it for me?

如果我写封信，你能替我寄出去吗？

辞典例句

May I borrow your pen to write a letter?

我可以借你的钢笔写封信 吗 ?

辞典例句

I must drop a line to my mother.

我必须给我母亲写封信.

辞典例句

That girl speaks she writes a letter for the family in per week.

那女孩说她每周给家写封信.

辞典例句

Write a letter to the principal to recommend a classmate.

给校长写封信向他推荐一名同学.

互联网

I am going to write to her this afternoon.

我打算下午给她写封信.

互联网

I write you a letter on paper with a pen.

我用钢笔在纸上给你写封信.

互联网

I can spook a letter for you, if necessary.

如果有必要,我可以代你写封信的.

互联网

I think I'll write home have a bath, and go to bed.

我想给家里写封信,洗个澡, 然后睡觉.

互联网

Write me when you get home.

你到家后给我写封信.

《简明英汉词典》