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
acate pneumonic tuberculosis
air tanker
Allen key
amynologic
AOEL
AORTF
aperture-field method
Bactris
benzene hexachloride (bhc)
cage structure
camcorders
caraca
carved wooden necklace
ccr(current cell rate)
centerbody
charge turbulent fluctuation
circle shear
circular shelf dryer
closed cycle
coefficient of self oscillation
conjugate locus
conservations of mass
corrosion resisting property
cost utility analysis
cross-adaptation
crumpacker
cryogenic heat pipe
crystalliser
diacetyl-dihydroxydiphenylisatin
dimethyl tartrate
double punch and blank-column detection
dower and courtesy interests
Duhring's diagram
enteric bacillus
epistatic gene
EPO-R
family Lobotidae
Fleet vehicle
fuze firing mechanism
gets along
graduated hopper-charging
gynaeco-
Hall flowmeter
hindshanks
honey glands
Johnny on the spot
lehmannite
listenest
literary critics
make one's escape
marieclaude
mechanization of maintenance
miniatus
molecular absorption band
mounting metallurgical specimens
musculus extensor digitorum longus pedis
network-connected
neutral phosphate
NIH-7519
orates
paddle type agitator
papillary foramen
paris-journal
Phyllomahaleb
pitching change
platform barrier
POPSIPT
Porlezzina
propeller-regulating mechanism
pulpiform
rassling
recovery flap
remerging
resistance-weld mill
rock bolting jumbo
S.S.P.
spheriflex hub
spring gage
stopine
sturrocks
subdetector
superpredicate
switching line
tail throat of a hump yard
teeming stage
tetralogies of fallot
the Met
The sands are running out.
theater air priority number
Themar
tie-in line
tin plate printing
tinamidaes
trachodonts
transfer target
turning block
turpentine wood oil
universal cutter and tool grinder
weather search radar
zahava
Zarp