好不容易来一次北京,不拍照多可惜啊.上次我在北京没拍照现在还后悔呢,让我帮你拍几张吧.英语

Hi
纯人脑翻~不是机器翻译哦.要生活口语版的翻译,
生活化：Let’s me take some photos for you.You can’t image how regretful i am for not taking any photo last time when i was in Beijing.
也可以这样:That would be a pity if you've been to Beijing yet not taking any photo!
And i was so regretted that i didn’t take any photo last time.Let me take some photos for you!