If there were a heavy snow next Sunday,we would not go skating.

题目

If there were a heavy snow next Sunday,we would not go skating.
这里为什么不能改成were to be a heavy snow?不是表将来吗?

答案

在非真实条件句中,与将来事实相反时,条件从句的时态为一般过去时/were+不定式/should+动词原形,主句为would / should/ could + 动词原形.你说的这个句子,因为从句中的是be动词,就要用过去式were的形式,如果用were to be 就有点重复了,而且不符合语感.