条件句也被称为if从句，是一种常见的英语表达句型。
一般来说，条件句分为两个部分：主句 + if引导的条件分句。条件句有各种各样的类型，每种类型都有各自的使用规则。今天我们就一起来学习一下条件句的相关知识吧！
Zero conditional-零条件句
用法
“zero conditional”指的是用于表达事实的条件句。在这种条件句中，没有假设的情况or潜在的未来可能，只有现在真实的条件。“zero conditional”常常用来表达科学事实。结构
if + 一般现在时，.....一般现在时。（主句，if句全部使用一般现在时）举例
If you mix blue and red, you get purple. If it rains, the grass gets wet. If I go to bed early, I always get up very early. If you want to come, call me before 5:00. If I make a silly mistake, I laugh.
First conditional-第一条件句
用法
“first conditional”指的是用来预测的条件句，在这种条件句中，条件是现在或将来真实存在的条件，“first conditional”通常用来表示现在或将来可能发生的事情。结构
if + 一般现在时，.....一般将来时。（主句使用一般将来时，if句使用一般现在时）举例
If I find her address, I'll send her an invitation. Elaine will buy the drinks if somebody helps her carry the bottles.Second Conditional-第二条件句
用法
“second conditional”通常用来描述假设的情况，这种条件句中，条件一般与现在或将来的事实相反。“second conditional”用来表示虚拟、假设的情况。结构
if + 一般过去时，.... would/wouldn't do举例
If I won a million dollars, I would buy a new car. If I were you, I would quit smoking. They would stay longer if they had more time.
Third Conditional-第三条件句
用法
“third conditional”同“second conditional”类似，用来描述假设的情况，但是在“third conditional”中，条件是与过去事实相反的。这种条件句通常用来表示假设过去的情况。结构
if + 过去完成时，.... would/wouldn't have done（过去将来完成时）举例
If I had got a gold medal, I would have been happy. If the weather had been good, we would have gone picnic. If she had studied hard last week, she could have passed the exam.小结
厚朴福利
获取KP备考语法资料
您只需要
扫描下方二维码
添加小马甲客服微信
发送【语法】即可获取
