b. 表示与过去誓死相反的情况
①形式;
条件从句的动词形式 主句的动词形式
If I (we,you,he,she,it,they)+had+过去分词 I (we) should
You (he,she , +have+过去分词或:
they,it ) would
所有人称+could(might)+have+过去分词
②用法:
I would have checked my paper again if I had had more time at yesterdays examination.(fact:I had no more time at yesterdays exam, so I didnt check my paper again)
You would have already recovered from his illness if he had seen the doctor in good time.(fact: He didnt see the doctor in good time ,so he hasnt recovered from his illness )
c. 表示与将来事实相反的情况
①形式:
条件从句的动词形式 主句的动词形式
a. If I (we,you,he,she,it,they)+行为动词的过去式(be的过去式一般用were)通常要与一个表将来的时间的状语连用
b. If (we,you,he,she,it,they)+should
+动词原形
c. If I (we,you,he,she,it,they)+were to+动词原形 I (we) should
You would +动词原形或:
he(she,it ) would
they would
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