高一英語(yǔ)全冊(cè)詞組復(fù)習(xí)教案3
a) 表示與將來(lái)事實(shí)相反的情況
339. ①形式：
340. 條件從句的動(dòng)詞形式 341. 主句的動(dòng)詞形式
342. if i (we,you,he,she,it,they)+行為動(dòng)詞的過(guò)去式（be的過(guò)去式一般用were）通常要與一個(gè)表將來(lái)的時(shí)間的狀語(yǔ)連用
343. if (we,you,he,she,it,they)+should
344. +動(dòng)詞原形
345. c. if i (we,you,he,she,it,they)+were to+動(dòng)詞原形 346. i (we) should
347. you would +動(dòng)詞原形或：
348. he(she,it ) would
349. they would
350. i (we,you,he,she,it,they)+could(might)+動(dòng)詞原形
351. 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. (條件從句謂語(yǔ)動(dòng)詞用were to +動(dòng)詞原形，表示 下雨的可能性極小。were to rain和should rain 都表示“出乎意料之外”，但were to加強(qiáng)表示“當(dāng)初沒(méi)想到以后的事”)
352. 混合時(shí)間條件句的用法：
i. 有時(shí)條件從句的動(dòng)作和主句動(dòng)作發(fā)生的 時(shí)間不一致。這時(shí)動(dòng)詞的形式，應(yīng)根據(jù)它所要表達(dá)的具體時(shí)間來(lái)決定用什么形式。
b) if she hadn’t trained so hard, she wouldn’t be run so fast.（從句敘述過(guò)去，主句敘述現(xiàn)在。）
i. （fact: she has trained very hard, so she would able to run fast.）
ii. you would speak english well enough if you had practised reading and speaking it every day.(主句敘述現(xiàn)在，從句敘述過(guò)去)
iii. （fact: you didn’t practice (hasn’t practiced ) reading and speaking it every day, so you can’t speak english well enough.）
iv. 在其他狀語(yǔ)從句中的用法
c) 主要用于由as if (as though) 引導(dǎo)的比較狀語(yǔ)從句，從句中謂語(yǔ)動(dòng)詞一般用“動(dòng)詞的過(guò)去式（be 變were ）或had +過(guò)去分詞。”
i. 如：
ii. she looked as if she were ill.(實(shí)際上她沒(méi)有病，在這里用虛擬語(yǔ)氣補(bǔ)語(yǔ)比喻她精神不佳)
iii. xiao liu speaks english so well as if he had studied in england.(這里用虛擬語(yǔ)氣表現(xiàn)他的 英語(yǔ)說(shuō)得好)
iv. （2）、在主語(yǔ)從句中的用法：
v. 通常由形式主語(yǔ)it引出的主語(yǔ)從句來(lái)表達(dá)。主語(yǔ)從句中，謂語(yǔ)動(dòng)詞用“should+動(dòng)詞原形”；表示“必要”“重要”“奇怪”等意思。
vi. it is necessary that you should clean the workshop after work.下班后你必須清掃車間。
vii. it is important that we should ask advice of other people about our work.在工作中，征求別人的意見(jiàn)是很重要的。
353. 在賓語(yǔ)從句中的用法（詳見(jiàn)《高一上學(xué)期英語(yǔ)語(yǔ)法重難點(diǎn)集匯》）