我上星期收到了母亲的一封信。

I had a letter from my mother last week.

《柯林斯英汉双解大词典》

我已经给母亲捎了个信儿，告诉她我回家晚点儿。（这里是“口信”的意思。）

I have sent mother a message to tell her I will be home late.

youdao

昨天我收的信是我的母亲来的。

The letter which I received yesterday was from my mother.

youdao

我写这封信给您是为了我母亲的法律地位。

I am writing to you to my mother's legal status.

youdao

我给我母亲写的信终于在周日收到了。

The letter I wrote to my mother got through at last on Sunday.

youdao

我给我母亲写的信终于在周日收到了。

The letter I wrote to my mother got through at last on Sunday.

youdao