邀请老外去吃饭,一般有以下常用句式：

I wonder if you have time this evening

Would you be interested in dinner with me

今晚能请您吃个饭吗

您喜欢去中餐厅还是西餐厅呢

I'll pick you up at 7:00 pm,if it's ok with you.

如果合适的话,我晚上7点去接您.