</p> 1. 与现在的事实相反:[If --- + were/did---, --- + would do---]- U: C/ S- D5 t' L; u5 J; F
If I were you , I would marry him.7 V5 C$ J% Y* O$ z i/ y4 J
如果我是你,就会嫁给他。
+ `8 v: L9 K. A' T 2. 与过去的事实相反:[If --- + had done---, --- +would have done---]+ r* G/ M8 D+ M d) l3 K! \6 e9 U I
If you had worked hard , you would have passed the exam.! F4 @' y( E3 v- }# ?, \
如果你用功学习,就会通过考试了。+ J4 d5 v" n4 B5 @1 ]. g2 s- l& \
3. 与将来的事实可能相反:[If ---+ should do---, ---+ would do---]
! A) ]0 z5 @! o% e If it should rain tomorrow , what would you do ?
3 Q0 o& y- G/ d 如果明天下雨,你怎么办?
R* g8 p0 F! E0 t 第二种:用在表示要求、建议、命令等的名词从句中中 华 考 试 网; U# F# y) a8 J" A
从句谓语形式为:“---(should ) + do sth”(在美语中should常省去) 。
, c0 E; K2 w/ y8 i 类似用法的动词有:
k- W4 Q) q4 V( {- I" {( `% j3 R insist (坚持) , suggest (建议) , order(命令) , propose (建议) , demand (要求) , command (命令) , advise (建议) , desire (要求、请求) , request (请求) , require (需要、要求) , ask (要求) , prefer (宁愿), recommend(推荐) , arrange ( 安排) , advocate ( 拥护、提倡) ,maintain(坚决主张)等后面的宾语从句中。) [" m+ q! X( W5 }3 G
第三种:用在“It + be + important (,necessary , natural , essential , strange , absurd , amazing , annoying , desirable, surprising , vital , advisable , anxious , compulsory , crucial , imperative , eager , fitting , possible , impossible , improper , obligatory , probable , preferable , strange , urgent 等, 以及insisted , suggested , ordered , requested , arranged , recommended 等) + that ---”结构中的that 引导的主语从句中
" ~# w4 e; Z5 |( b! k 第四种:用在It is time that --- 结构中, 表示“该干某事了”, 含建议的意思, 用动词过去式。* U! N6 [) F% j
It is time (that) we went to bed .
0 A, g5 ^# f3 w; ^" x 咱们该睡觉了。
) _( i& s Z" H% g0 S0 _- s* W 注意: time 前可加about (表示“大约”) 或high(表示“强调”) 等。 |