请老师帮我解答第一和第二题

解题思路： 关键是掌握虚拟语气的基本结构希望能帮到你，还有疑问及时交流
解题过程：
1. If he had enough friends, he would not feel lonely.
2. I wish i had got a high grade.
if you had prepared for your math test, you would not have got a low grade.