I am writing to ask for some information about courses.

我写信是想了解关于课程的情况。

《牛津词典》

I'm calling to ask for some information.

我打电话询问一些情况。

youdao

Helen: I came here to ask for some information.

海伦：我来打听一下情况。

youdao

Helen: I came here to ask for some information.

海伦：我来打听一下情况。

youdao