高中英語語法：虛擬條件句的倒裝
虛擬條件句的從句部分含有were， should， 或had時(shí)， 可省略if，再把were， should或had 移到從句的句首，實(shí)行倒裝。例如：
Were they here now， they could help us. =If they were here now， they could help us.他們現(xiàn)在在的話，就會幫助我們了。
Had you come earlier， you would have met him. =If you had come earlier， you would have met him.你來得早一點(diǎn)，就碰到他了。
Should it rain， the crops would be saved. =Were it to rain， the crops would be saved.假如下雨，莊稼就有救了。
注意：在虛擬語氣的從句中，動詞的過去時(shí)態(tài)一律用were，不用was，即在從句中be用were代替。例如：
If I were you， I would go to look for him. 如果我是你，就會去找他。
If he were here， everything would be all right. 如果他在這兒，一切都會好的。
典型例題
_____ to do the work， I should do it some other day.
A. If were I B. I were C. Were I D. Was I
答案C. 在虛擬條件狀語中如果有were， should， had這三個(gè)詞，通常將if省略，主語提前， 變成 were， should， had +主語的形式。但要注意，在虛擬條件狀語從句中，省略連詞的倒裝形式的句首不能用動詞的縮略形式。如我們可說 Were I not to do， 而不能說 Werent I to do.
表示比較程度差別關(guān)系的前綴
1）by-, 表示副，次要的
byproduct, bywork（副業(yè)）
2）extra-,表示超越，額外
extraordinary,
3）hyper- 表示超過，極度
hypersonic（超聲波）, hypertesion（高血壓）
4）out-,表示超過，過分
outdo（超過）, outbid（出價(jià)過高的人）
5）over-，表示超過，過度，太
overeat, overdress, oversleep
6） sub-, suc-, sur-, 表示低，次，副，亞
subeditor, subordinate, subtropical（亞熱帶）
7）super-, sur- 表示超過
supernature, superpower, surplus, surpass
8）under-,表示低劣，低下
undersize, undergrown, underproduction（生產(chǎn)不足）
9）vice- 表示副，次
vicepresident, vicechairman
虛擬條件句的從句部分含有were， should， 或had時(shí)， 可省略if，再把were， should或had 移到從句的句首，實(shí)行倒裝。例如：
Were they here now， they could help us. =If they were here now， they could help us.他們現(xiàn)在在的話，就會幫助我們了。
Had you come earlier， you would have met him. =If you had come earlier， you would have met him.你來得早一點(diǎn)，就碰到他了。
Should it rain， the crops would be saved. =Were it to rain， the crops would be saved.假如下雨，莊稼就有救了。
注意：在虛擬語氣的從句中，動詞的過去時(shí)態(tài)一律用were，不用was，即在從句中be用were代替。例如：
If I were you， I would go to look for him. 如果我是你，就會去找他。
If he were here， everything would be all right. 如果他在這兒，一切都會好的。
典型例題
_____ to do the work， I should do it some other day.
A. If were I B. I were C. Were I D. Was I
答案C. 在虛擬條件狀語中如果有were， should， had這三個(gè)詞，通常將if省略，主語提前， 變成 were， should， had +主語的形式。但要注意，在虛擬條件狀語從句中，省略連詞的倒裝形式的句首不能用動詞的縮略形式。如我們可說 Were I not to do， 而不能說 Werent I to do.
表示比較程度差別關(guān)系的前綴
1）by-, 表示副，次要的
byproduct, bywork（副業(yè)）
2）extra-,表示超越，額外
extraordinary,
3）hyper- 表示超過，極度
hypersonic（超聲波）, hypertesion（高血壓）
4）out-,表示超過，過分
outdo（超過）, outbid（出價(jià)過高的人）
5）over-，表示超過，過度，太
overeat, overdress, oversleep
6） sub-, suc-, sur-, 表示低，次，副，亞
subeditor, subordinate, subtropical（亞熱帶）
7）super-, sur- 表示超過
supernature, superpower, surplus, surpass
8）under-,表示低劣，低下
undersize, undergrown, underproduction（生產(chǎn)不足）
9）vice- 表示副，次
vicepresident, vicechairman
