本文目录
If的基本用法
- 表示条件,引导条件状语从句
- if + 条件状语从句 + 主句
If的三种类型
1. 真实条件句
- 表示实际存在的情况
- 条件从句用一般现在时,主句用一般现在时或将来时
- if + 简单句,主句
2. 虚拟条件句(与事实相反)
- 表示虚拟的情况,与现实相反
- 条件从句用过去式,主句用would/could/might + 动词原形
- if + 过去式,主句
3. 虚拟条件句(对未来的假设)
- 表示对未来的假设
- 条件从句用一般过去时,主句用would/could/might + 动词原形
- if + 条件从句,主句
If的常见句型
- If I were you, I would...
- If it rains tomorrow, I will stay at home.
- If I had enough money, I would travel around the world.
- If he had studied harder, he would have passed the exam.
- If he comes, please tell him to wait for me.
总结
- if引导条件状语从句,表示条件
- 三种类型:真实条件句、虚拟条件句(与事实相反)、虚拟条件句(对未来的假设)
- 常见句型:If I were you..., If it rains tomorrow..., If I had enough money..., If he had studied harder..., If he comes...