If引导的条件状语从句
条件 | IF从句 | 主句 | 例句 | 特别说明 |
---|---|---|---|---|
Zero conditional 现在的真实条件句 (只需要了解) | 一般现在时 | 一般现在时 | If you freeze water, it turns into ice. If I have time, I usually watch TV. | 用于普遍真理, 必然发生的事情或习惯动作 |
1st conditional 第一条件句 将来的真实条件句 (AEIM II U5) | 一般现在时 (*有时也可用现在进行时和现在完成时) | 一般将来时 (will+动词原型) | If I have time, I will watch TV tonight. Please call me if you have time. You can call me if you have time. | “主将从现”; 有时主句也可用祈使句(主祈从现)或情态动词(如can, must等)代替将来时态 |
2nd conditional 第二条件句 现在和将来的非真实条件句 (AEIM II U14) | 一般过去时 (did) | would +动词原型 (should/could/ might do) | If I had time, I would watch TV now/later on. | if从句be动词通常用“were”; 注意情态动词使用中的区别 |
3rd conditional 第三条件句 过去的非真实条件句 (AEIM II U16) | 过去完成时 (had done) | would have +过去分词(should/could/ might have done) | If I had had time, I would have watched TV yesterday. | 区别(would/should/could/might have done) |
注意:条件状语从句也可用when, unless(=if not)等连词连接, 注意区别。
梦回高三::quyin:hematemesis::
::quyin:die::
初中就开始玩虚拟语气了?::quyin:1huaji::
是哦 外国语学校嘛::quyin:hematemesis::
原来如此,我们高中才开始学::quyin:fue::
高三背单词,一整年字母a打头没背过去