“如果，爱是流沙。”这句话怎么翻译成英语？

If love was flowing sand.
这里，IF是介词所以不应该在后面打逗号，而这里紧跟的是虚拟语气，所以应该用过去式。

If, love is like flowing sand.

If, the love is a quicksand."

If, the love is the wind-drift sand