[10-20 18:11:12] 来源：http://www.67xuexi.com 高一英语 阅读：85231次
345. +动词原形
346. c. If I (we,you,he,she,it,they)+were to+动词原形347. I (we) should
348. You would +动词原形或：
349. he(she,it ) would
350. they would
351. I (we,you,he,she,it,they)+could(might)+动词原形
352. ②用法：
a) If it rains tomorrow, our picnic will be put off.(The weather has been changeable these days.)
b) If it rained tomorrow, our picnic would be put off.( The weather has beenvery good these days.)
c) If it should rain tomorrow, our picnic would be put off.(That would be out of our expectation.)
d) 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”)
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