If you go to the party,you'll have a great time= You won't have a great time,unless you go to the party= If you don't go to the party,you won't have a great time大神，我要的是If you go to the party,you'll have a great time的3a这个单元的3a文章那帮不了你了不过我已经找到了，还是谢谢了。