时间:2019-02-06 作者:英语课 分类:英文语法词汇


英语课

   be动词(am、is、are)+not、


  情态动词can+ not、
  助动词(do、does) + not
  如何将一个肯定的陈述句改为否定句:
  1、看句中有无be动词,如有,直接在be动词后+ not。
  2、看句中有无情态动词,如有,直接在情态动词后+ not。
  3、如上述二者都没有,就应用助动词+ not。分四个步骤:
  (1)肯定陈述句中本来是没有助动词的,要加上去,位置在主语(某人或某物)后,动词前。
  (2)确定助动词用do、does,根据句中动词,动词是原形的助动词就用do,动词是第三人称单数的助动词就用does,
  (3)在助动词后加not。
  (4)原句中动词假如发生变化就要恢复成原形。
  强调一点,有some的要考虑是否要用any。
  be 的用法口诀
  我用am,你用are,is连着他,她,它;
  单数名词用is,复数名词全用are。
  变疑问,往前提,句末问号莫丢弃。
  变否定,更容易,be后not莫忘记。
  疑问否定任你变,句首大写莫迟疑。
  be动词的用法:be (be/is/are/am/was/were)

标签: Be动词
学英语单词
absolutely-unbiassed estimation
acroterion
amidoxim
armigeres (leicesteria) digitatus
Aylesworth, Mt.
be locked in sth
Bechterew's layer
black lead first coating anticorrosive
brain bleach
brown edema
cacoethic
cement-bonded wood chipboard
cesium carbonate
chemical quantity transducer
coal-tar gas
Cobalion
combined accounts
company concentration
conditional access system
contour patch
controvertor
cost records
crystallographic interplanar spacing
curved substrate
cut-middles method
cycle tyre
cytozoon
db galaxy
debugging software package
diporate
disanalogies
disparented
downstream boundary
draft equipment
ecomigrations
electronic circuit analysis program ii
error covariance
erzsebet
F.E.
ferility control program
first-season
flashing sign
fuck ... about
goniozyten
grandiflorum
grumpity
hardnut
haunch-up
hemostasisrelated
holdest
hoohaa
HSBR
hydraulic static cone penetrometer
ICBM vehicle
instrumentalizations
kreeger
laryngeal hook
Lax Firth
listening-post
log canoe
merrera
methyl cresol
micro-kinetics
microphone pick up pattern
mineralogized
Nalbandyan
naphthyl lactate
ndos
Neuville-lès-Dames
non-metallic ion
o-xylene oxidation
outer-sphere complex
outside primary
Oxythiospasmin
palmar surface
photomicrographs
pilot boring bar
planetary-science
principal trade partners
reinforcing bar spacing
resistnace grounded neutral system
retilts
rjs
Rosa giraldii
Saussurea flexuosa
scientific creation
secondary addisonism
spent acid
splenorenal
stand of sapling
strung-up
stupid person
Sulcus medianus posterior
tape drum
taxing of agriculture land
tetrahydrocyperaquinone
the greatest
time-current characteristics
tubulosa
vibronic level
water edge
yard-long bean