表达愿望用法的虚拟语气
wish的用法：
Wish 后跟随一个从句时,从句的谓语动词要用虚拟语气.
1.用wish表达现在的愿望时,后面的从句要用过去式(be动词用 were).
I wish someone helped me to learn English.
我希望有人能帮助我学习英语.
2.用wish表达将来的愿望时,后面的从句 要用过去将来一般时（would/could/might+动词原形）.
I wish someone would/could/might help me to learn English.
3.用 wish表达对过去一种不可能实现的愿望时,从句用过去完成时（had+过去分词）或过去将来完成时（would/could have+过去分词）.
I wish someone had helped me to learn English. 或是
I wish someone would/could have helped me to learn English.
那时要是有人帮我学习英语就好了.