我在美国，想邀请我妈妈假期过来玩，怎么写邀请信啊？谁给我写个范本？

如果是在大学的，可直接向校方申请，由校方来发邀请函，签证即可一步到位。

To: Visa Officer, United States Consulate
****, China

My name is ***, and I am a student with a **(visa type) visa attending ** University in ****(location). My mother is applying for a visitor’s visa to come to see me in **(time).

I will not be returning to China until next ***(time), and I have not seen my mother since last ***(time). I miss her very much and it is my wish that she will be permitted to travel to the United States to visit me. She has never been abroad, and I feel it would be a wonderful opportunity for her to take a tour of the United States. As for the monetary considerations of taking such a trip, my mother will stay with me during her visit, and she has sufficient funds for her trip.

It is my hope that you will grant her a visa so she can spend a couple of weeks here with me. My Email is **** and my phone is ********. Please do not hesitate to contact me with any questions or c