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
achromatopsia
age-specific natality
airplane splint
amnioscopies
antioxidant properties
basic work
bavituxumab
beltways
book-printing
bridge measurements
buildup pressure
C. G. H.
Cahenslyism
CalciCaps
caldera
chrysochlorids
clinical rheumatic diseases
completely unstable
composite fruit
conducting rope
confreres
cooperative buying
copper alum
decomplexifying
delay series
despotisms
direct differential geometry
double flank honing
eculee
effective bearing spacing
equatorial horizon projection
extra news
faggot vote
fluitante
fontanas
fuzzy subset
geothermal energy section
gonidial colony
headliest
highpoint
ice cloud
impishly
in air
institution private property
intermediate Jacobian variety
interrupting channel
ischemic enteropathy syndrome
kilowatt hour metre
mastercard
megaphanerophyte
metropolitan opera
Mills cross
mine as
Mini SQL
mixed chromatography
multi-deck bridge
nickering
Norwegia
one-side galvanized steel
opaque glass
palmar ligament
paritaprevir
pathological inertia
Pattani
possible arrangement
post-detection
proving range
radio storm
rhizina undulata
risk of shortage
Rohdea
save as you earn
Scutellaria incisa
set point of temperature
Shannon equation
short field
sinusoidal imput source
social-bias
soil depletion
specary
split cottar
status line
stinking nightshade
strobili
subcript
suitmaker
summa
supplementary ovulation
taconic mts.
tampon cannula
tenon-saw
thin sheet flow
thrash over
throw into disorder
tranquilised
tryna
Tugela R.
tulipiferas
unmechanical
unsalubrious
vacuum and heating drying
visual tool