你在给谁写信请求帮忙？

Who are you writing to for help?

youdao

你在给谁写信呢？

Who are you writing to?

youdao

你在给谁写信？

Who are you writing to?

youdao

你在想什么呢？我在想我的功课。你在给谁写信呢？

What are you thinking about? I'm thinking about my lesson. Who are you writing to?

youdao

你知道他正在给谁写信吗？

Do you know who he is writing to?

youdao

你知道他正在给谁写信吗？

Do you know who he is writing to?

youdao