請老師幫我解答第一和第二題

題目：

解答：

解題思路： 關鍵是掌握虛擬語氣的基本結構希望能幫到你，還有疑問及時交流
解題過程：
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.