时间:2019-02-13 作者:英语课 分类:英文语法词汇


英语课

   学习祈使句的四个要点


  祈使句是表示请求、命令、劝告、祝愿或建议的句子。祈使句的主语一般为第二人称,但往往省去不用。同学们在学习祈使句时应注意以下几点:
  一、祈使句谓语用何动词形式
  英语祈使句的谓语总是用动词原形。如:
  Be quiet! 别说话!
  Come earlier next time. 下次早点来。
  Have a good time. 愿你玩得痛快。
  Go and tell her. 去告诉她吧。
  注:有时为了加强语气,可在动词前加do。如:
  Do be careful. 务请小心。
  Do come on time. 务必请准时来。
  二、肯定祈使句如何变成否定祈使句
  祈使句否定式的构成方法是在动词原形前加don’t:
  Don’t be late. 不要迟到。
  Don’t speak so loud. 别这么大声说话。
  Don’t walk on the grass. 不要在草坪上走。
  Don’t lose 1 the key. 别把钥匙丢了。
  Don’t come unless 2 I telephone. 除非我打电话,否则你别来。
  三、与please连用以使语气委婉
  为使语气委婉,通常将祈使句与please连用。Please可用于祈使句的句首(其后通常不用逗号)或句末(其前通常用逗号)。如:
  Please don’t get angry. 请不要生气。
  Please drive more slowly 3. 请开得慢一点。
  Please cut me a piece of cake. 请给我切一块蛋糕。
  Please try to be quiet. 请设法保持安静。
  Please repeat 4 what you’ve just said 5. 请把你刚才说的话重复一遍。
  四、关于以let开头的祈使句
  Let’s eat out tonight. 我们今晚出去吃饭吧。
  Let me have a try. 我来试一试。
  Let me show you how to do it. 我来告诉你怎样做。
  Let every man do his best. 让每个人人尽其才。
  Let the meat cook slowly. 把肉用慢火炖。
  注意:
  1. 这类祈使句的否定式有两种形式。如:
  Let’s not hurry. / Don’t let’s hurry. 我们不要太急。
  2. let后用作宾语补足语的动词要用原形,不能用带to的不定式。

v.丢失,失去,迷失,(钟表)走慢
  • I always lose at cards, with my bad luck.我不走运,打牌总输。
  • I can always lose myself in a good book.一本好书会使我爱不释手。
conj.如果不,除非
  • You will fail unless you work hard.如果你不积极工作,就会失败。
  • Don't ask me to explain unless you really don't understand.不要叫我解释,除非你真的不懂。
adv.慢地,缓慢地
  • Speak more slowly,please.请说慢一点。
  • Do it slowly and carefully.要慢慢仔细地做。
n.重复,反复;vt.重复,复述;vi.重复;adj.重复的,反复的
  • There will be a repeat of this talk next week.下星期将重播这次讲话。
  • History will not repeat itself.历史不会重演。
v.动词say的过去式、过去分词
  • He said to me that he could not come.他对我说他不能来。
  • He said to his mother that he would do it by himself.他对他的母亲说他将自己独立做那件事。
标签: 祈使句
学英语单词
a staff of domestic
aedes (finlaya) albocinctus
Agarwal-Cooley algorithm
Al 'Idwah
angiomatous type of urethral caruncle
bejuggling
biogenies
Bismotostibiconite
blind off a line
cabon
carburized case depth
case-carburizing
cavoite
cesser and lien clause
Charlie Foxtrot
charter members
choree
circulating air
classical diffusion
compactly
continuous autofocus
cottin
dehumidified
disorganising
diver's sign language
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eddic
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far-out comparison
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genus hydrastiss
gnininvis
gray cast-iron powder
halo blight
Hansen coefficient
hexagonal closed single head spanner
Hormoteston
i-sompned
ilb
in storest
international commercial loan
jeg
joint direct attack munitions
kristopher
lactaldehyde
lamassus
laminated-fabric plate
lapidific
Likurga
main focus
main hum
multicutlathe
musculi iliacus
navigation region
ophthalmic applicator
opinionless
OSCJ
Oum-Chalouba
Outremont
ox-going
per-sheeting
presses ahead
primary wave
primitive music
progressing to
Psychotria siamica
pulse radiolysis
pumped well
radius bar pin
reflectorise
rent exploitation
sand bearing test
sarcophaga fenchihuensis
Savac
segment buffer
self-shield
semiautomatic ground environment system
shadowgraph method
silica wool
slow fission
sphaerirostris turdi
Stavropol'
synthetic resin gum
Tervueren
thiofide
trabeculae carneae cordis
traffic vibration
transient component
trautvetteria carolinenses
Trinidad, G.
tuberosity of cuboid bone
tunnellers
tyre mileage rating
underlying cost
unexposed side
unpaved road
Ushimawashi-yama
ventrifixure
wants in
wind break
without sake