"假如有你"是中文，意思是"if you were with me"或"if you were here"。这是一句常用的感叹句，表达对某人的思念或想念。

下面是一些英文例句及其中文翻译：

If you were here, everything would be so much better.
假如有你，一切都会好很多。

I wish you were with me right now.
我希望你现在和我在一起。

If only you were here to see this.
假如有你在这里看到这个就好了。

这句话的来源可能源自中文，也可能源自英文。常用的感叹句通常有多种语言版本，表达的都是类似的意思。