时间:2019-01-04 作者:英语课 分类:英文语法词汇


英语课

   现在让我们来比较一下现在完成时和现在完成进行时。在比较这两个时态时,关键在于对现在完成进行时的基本概念是否理解,因为对于现在完成时我们已经有了一个基本的理解了。


  现在完成进行时是一兼有现在完成时和现在进行时二者基本特点的时态。由于它有现在完成时的特点,所以它可以表示某一动作对现在产生的结果或影响。由于它有现在进行时的特点,所以它也可以表示某一动作的延续性、临时性、重复性、生动性乃至感情色彩。
  现在就现在完成进行时的这些特点和现在完成时作一简单的比较:
  (1)现在完成进行时和现在完成时皆可表示动作对现在产生的结果,但前者所表示的结果是直接的,而后者所表示的则是最后的结果。如:
  We have been cleaning the classroom. (a)
  We have cleaned the classroom. (b)
  (a)句可译为“我们打扫教室来着。”其直接结果可能是:我们身上都是灰。(b)句可以译为“我们把教室打扫过了。”其结果是:现在教室很清洁,可以用了。另外,(a)句表示教室刚刚打扫过,(b)句则可能表示教室是昨天打扫的。
  Be careful! John has been painting the door.(a)
  John has painted the door.(b)
  (a)句表示约翰刚刚把门油漆过,现在油漆还未干,所以你要小心。(b)句则无此含义,油漆可能已干了。
  (2)现在完成进行时有时有延续性,现在完成时往往没有。如:
  They have been widening the road. (a)
  They have widened the road. (b)
  (a)句的意思是他们在加宽马路,但尚未完工。(b)句的意思则是已完工了。有时现在完成时有延续性(如一些属于持续体的动词),但无临时性质。如:
  Mr. Smith has been living in London since 1978.(a)
  Mr. Smith has lived in London since 1979.(b)
  (a)句有“史密斯先生在伦敦久居”的含义,(b)句则没有。
  (3)但现在完成进行时并不总是具有临时的性质,如:
  My mother has been teaching English for twenty years. (a)
  My mother has taught English for twenty years. (b)
  (a)句在此并无临时性质,但较口语化。(b)句则较为正式。另外,(a)句表示动作现在仍在继续,并将延续下去,(b)句的动作是否延续下去,须由上下文决定,但在一般情况下都是延续下去的。
  (4)现在完成进行时往往表示动作在重复,现在完成时则常常不带重复性。如:
  Have you been meeting her lately? (a)
  Have you met her lately? (b)
  (a)句有“经常相会”之意,(b)句则没有。(b)句如与often, every day等时间状语连用,当然也表示动作在重复。
  (5)现在完成进行时比较生动,有时含有明显的感情色彩,而现在完成时往往只说明一个事实,一种影响或结果,平铺直叙,没有什么感情色彩可言。如:
  What have you been doing? (a)
  What have you done? (b)
  (a)句表示惊异,(b)句只是一个问题。
  Have you been waiting long? (a)
  Have you waited long? (b)
  (a)句比(b)句生动。另外,(a)句比较口语化。
  I have been wanting to meet you for long. (a)
  I have long wanted to meet you. (b)
  (a)句比(b)句更亲切,更有礼貌。
  Recently Mary has been doing her work regularly. (a)
  Recently Mary has done her work regularly. (b)
  (a) 句显然是在表扬玛丽,(b)只说明一个事实。
  下面还有一例,颇为有趣:
  Who's been eating my apples? (a)
  Who's eaten my apples? (b)
  (a)句有强烈的感情色彩,表示愤怒不满,(b)句只是希望回答的一个问题。另外,(a)句兼有进行时态,所以有“苹果未被全部吃光”的意思,(b)句是完成时态,说明“苹果一个不剩了”。

标签: 现在完成时
学英语单词
-wick
abite
aequator lentis
anti-torque rotor
articles of consumption
automotive exhaust
balasees
Belarusan
black-boards
BOS (back-out system)
business-process reengineering (bpr)
bustler
cartbote
casade amplification
cervical membrane
clearness number
climacteric melancholia
collateral value
compacting press
complete formula feed
daequan
david-and-goliath
die for pipe thread
differential-pressure cell
e.&e.o.
EAI, E.A.I.
effective core diameter
elementary cooperative
existentialisms
f.i.l.o.
factor antithesis
fairship
first-in first-out list
fix-point estimation
forward line of troops (flot)
gempylid
glue applicator
graphic optimization
grave-dressing phase
Homo erectus lantianensis
ignis St.Ignatii
jabusch
leaf spot of tea
lifting expenses
linearity coil
LP piston
monkeywrenches
Morshanskiy Rayon
MOSRAM MOS (random access memory)
Moulay-Idriss
Multilyte
Napoleonian
narcinid
national dose
negative cut-off grid voltage
Neo Latin
nodular(melanoma)
normal mode
octosyllabic
oligodendroglial cell
on-line document retrieval system
Onchocerca gibsoni
over-dimensioned
paishi granules,paishi keli
Philadelphia chromosome,Ph chromosome
plicae sigmoidea
polyethersulfones
ponkal
privilege of parliament
proportion of mixture
protein energy malnutrition
puts through
qualitative histology
quick operation blower valve
quinine carbolate
random mating
relative humidities
reloading procedure
resolution of amino acld
riveting joint
rodnt ulcer
sarellas
SC (semi-conductor)
semanotus bifasciatus sinonauster
semifactual
Shinowara-Jones-Reinhart method
sliver lay-in circular knitting machine
sodium morrhuate
Spanish omelets
stack friction
steel horseboats
sunken meadow
tirupatis
Turpinia
venosity
vigorous economic growth
werewolfish
whip apparatus
wick lubricator
Wilks' symptom complex
X-ray photograph, X-ray picture
zig-zag fold