英语达人请进,求教两个句子~

问题描述:

英语达人请进,求教两个句子~
If the dialect was kept from daily use,the culture will be broken,which is also a great loss of traditional treasure,
我的问题是,条件句是虚拟语气与现在相反,为何主句却没有用would?而用will,这句话是否有语法错误?
另外,if虚拟语气与将来相反,条件句的动词形式到底能否用过去时?还是只有“should+do" "were to do" 两种.
第三,Lest we should find ourselves forever lose our rich cultural diversity,这个句子是否正确,如果正确,句中should 能否省略?

1.如果是对现在事实相反,从句用动词过去式(be动词过去式一般用were) 我觉得这么改:If the dialect was kept from daily use,the culture would be broken,which would also be a great loss of traditional treasure,
2.与将来相反,条件句的动词形式只有“should+do" "were to do" 两种.
3.满对的