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②用法： I would have checked my paper again if I had had more time at yesterday’s examination.(fact:I had no more time at yesterday’s exam, so I didn’t check my paper again) You would have already recovered from his illness if he had seen the doctor in good time.(fact: He didn’t see the doctor in good time ,so he hasn’t 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 I (we,you,he,she,it,they)+could(might)+动词原形 ②用法： If it rains tomorrow, our picnic will be put off.(The weather has been changeable these days.) If it rained tomorrow, our picnic would be put off.( The weather has beenvery good these days.) If it should rain tomorrow, our picnic would be put off.(That would be out of our expectation.) If it were to rain tomorrow, our picnic would be put off. (条件从句谓语动词用were to +动词原形，表示 下雨的可能性极小。Were to rain和should rain 都表示“出乎意料之外”，但were to加强表示“当初没想到以后的事”) (责任编辑：admin) |