If I win a lot of money,I'll help the people who are poor
If I win a lot of money,I'll help the people who are poor（改为虚拟语气）
不知能否下雪） 3。 （事实：来的可能性很小） 2.+主语 +should/. 如果下周日下大雪;might+do+其他 例。（事实;would/.+主语 +should/，我们就不能去滑冰了.If she were to be there next Monday： 1.If he should come here tomorrow, I should/would talk to him. 如果他哪天来这儿的话，我就跟他谈谈;could/should/were to do+sth;would/could/might+do+其他 ③if+主语+should+do+sth.+主语+should/would/could/might+do+其他 ② if+主语+did/be(were)+sthIf I won a lot of money, I would help the people who are poor.
解析：表示对将来情况的主观推测 ①if+主语+did/.If there were a heavy snow next Sunday, we would not go skating, I would tell her about the matter. 如果她下周一来这儿的话