1.我想给她写封信。。 I want to write a letter to her.
2.这有一封你的信。 There is a letter to / for you
to / for都可以
3.There is a letter from Lilei to
from 。。 to 固定搭配
I will write a letter to her
There is a letter to you
There is a letter from Lilei to you or There is a letter from Lilei
1,
i want to write a letter to her.
2. here is a letter for you.
3.用to, from .. to..搭配
I want write to her; to