If 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/should/were to do+sth.+主语+should/would/could/might+do+其他 ② if+主语+did/be(were)+sth.+主语 +should/would/could/might+do+其他 ③if+主语+should+do+sth.+主语 +should/would/could/might+do+其他 例：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.（事实：来的可能性很小） 2.If there were a heavy snow next Sunday,we would not go skating.如果下周日下大雪,我们就不能去滑冰了.（事实：不知能否下雪） 3.If she were to be there next Monday,I would tell her about the matter.如果她下周一来这儿的话,我就会告诉她这件事的始末.