时间:2019-03-06 作者:英语课 分类:英语PK台


英语课

   第四讲 虚拟语气在几大经典款短语及从句里的运用


  第四类:It's time从句用虚拟
  从句谓语通常用过去式表示现在或将来,有时也用过去进行时或“should+动词原形”(较少见,且should不能省略),其意为“(早)该干某事了”。It's = It is 所以一般是对现在或将来的假设,“现在该干某事了.....”。
  例句:It's time we ordered dinner.
  现在该叫菜(晚餐)了。
  I think it's time you made up her mind.
  我想你该拿定主意了。
  第五类:would rather后句子用虚拟
  通常用一般过去时表示现在或将来的愿望(必然是一种假设),用过去完成时表过去的愿望
  例句:I'd rather you didn't do it.
  你宁愿你别这样做。(现在或将来的愿望)
  I would rather you didn't mention the price.
  我宁愿意你不提价钱。(现在或将来的愿望)
  I would rather you hadn't said it.
  我真希望你没这么说过。(过去的愿望)
  第六类:某些用虚拟语气的宾语从句
  在表示“坚持”、“命令”、“建议”、“要求”等(因为都是尚未发生之事)后的宾语从句要用虚拟语气。这类动词有人归纳为“一个坚持 (insist)、两个命令 (order, command)、三个建议 (advise, suggest, propose)、四个要求 (demand, require, request, ask)”,这类虚拟语气由“should+动词原形”构成,其中的should在美国英语中通常可以省略。
  例句:I insisted that he (should) stay.
  我坚持要他留下。
  The doctor advised that he(should) change his job.
  医生劝他换工作。
  特别注意:动词insist, suggest后接宾语从句时,除可用虚拟语气外,也可用陈述语气,两者的区别是:若从句内容尚未成为事实,则用虚拟语气;若从句内容已经成为事实,则用陈述语气。
  例句:He insisted that I had read his letter.
  他坚持说我看过他的信。(已成事实)
  He insisted that I should read his letter.
  他坚持要我看他的信。(尚未成为事实)
  第七类:某些用虚拟语气的主语从句
  形容词 important, impossible, necessary等后的主语从句通常用虚拟语气。It is important 做某事很重要;It is impossible 做某事不可能;It is necessary 做某事很必要,其实都是指向尚未发生的事情,用虚拟也就理所当然了。
  例句:It is impossible that he should leave here.
  他不可能会离开这儿。
  It is necessary that he be sent there at once.
  有必要马上派他到那里去。

标签: 英语PK台
学英语单词
4-isopropyl-1-methylcyclohexane
accompanying vein of hypoglossal nerve
aging gene
allergise
Allium cyaneum
alter heading
alumnus
amphiroa foliaceae
andrase
ankylosaurian
balsamize
block capital grant
butyl rubber sealant
calistoes
cam plastometer
caper sauce
carbon membrane
cellulose methyl ether
chintse
common calamint
cracklings removal
cyclopean eye
dark adaptation electroretinogram
defeminated
Eastermonth
feed back heater
fold filling
format code
furyl
gabelhorns
gardi
gavial
geocoordinates
hairtail
hapt-
Heliolites
hydantoin propionate
jahad
John Cleese
Karshi
knowledge space
lake hydrology
large poodle
laser damage of glass
leval indicator
LLud
longitudinal pronephric duct
m-to-m
major path satellite earth station
maleic acid resin
medicine and pharmacology
mohair top
monocaprin
Morlet
MSI (medium-scale integration)
muleless
multizone(d) reactor
nitrogen hardening
nonlinear phase-locked loop model
normal form game
oblique helicoid
Ophiodon
orbicular ligament
pandiagonal
Pey-ronie disease
pornonormativity
potato hollow heart
Praetorius, Michael (Michael Schultheiss)
pressure type reactor
prevent recurrence
psittaci
rail milling machine
regenerant consumption
Rineanna
robert louis stevensons
sealed pressure balance
selectively doped heterostructure transistor
selectivity clause
semiconductive chemical compound
sheath flow
shipway
sikes hydrometer
skieurs
statistical multiplexing
steel crucible
surface inactivation
tear sacs
tegumental spine
tided over
to observe
transactivator
Triosteum
tuberculosis of male genito-urinary system
turbidometric
two-way reinforced concrete
unappropriated retained earnings
unconceitedly
undefined coefficient method
unilateral lesion
vibilia propinqua
voltage-regulating transformer
wellto