时间:2019-02-08 作者:英语课 分类:英文语法词汇


英语课

1) 两词都是'必须'的意思,have to 表示客观的需要, must 表示说话人主观上的看法,既主观上的必要。
  My brother was 1 very ill, so I had 2 to call the doctor in the middle of the night. 我弟弟病得很厉害,我只得半夜里把医生请来。(客观上需要做这件事)
  He said 3 that they must work hard. 他说他们必须努力工作。(主观上要做这件事)

2) have to有人称、数、时态的变化,而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。
He had to look after his sister yesterday.

3) 在否定结构中: don't have to  表示"不必"
          mustn't    表示"禁止",
   You don't have to tell him about it.  你不一定要把此事告诉他。
   You mustn't tell him about it.    你一定不要把这件事告诉他。





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1
was
bglwv
  
 


v.(is,am的过去式)是,在


参考例句:





He said he was right.他说他是正确的。
He was cold and hungry.他又冷又饿。












2
had
FeBxb
  
 


vbl.have的过去式和过去分词;conj.有


参考例句:





I just had a good idea!我有个好主意!
The boy had a small branch of a tree in his hand.这个男孩手上拿一条小树枝。












3
said
IYtxh
  
 


v.动词say的过去式、过去分词


参考例句:





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。













v.(is,am的过去式)是,在
  • He said he was right.他说他是正确的。
  • He was cold and hungry.他又冷又饿。
vbl.have的过去式和过去分词;conj.有
  • I just had a good idea!我有个好主意!
  • The boy had a small branch of a tree in his hand.这个男孩手上拿一条小树枝。
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。
学英语单词
(Robaxin)Methocarbamol
a. ophthalmica
aitcs
angular dispersion
antique-dealer
aureolarias
Banteay Chey
be mounted
bichats
bumper jar
butt-chin
cardiac disease in toxemia of pregnancy
cercis likiangensis chun
certificate of beneficial interest
Chang Kuo
changeless
chion-
colega
collie eye anomaly
component truss
comprehensive confirming house shipment policy
congenital retinal fold
contact insertion and withdrawal force
contractualises
deblending
design proposal
desklamps
desksize computer
diffuse choroidal sclerosis
disappear to
downward storke
dynamic discovery
earning related benefit
ensta
entergy
Erypin
essential enzyme
flat-topped ridge
flow dichroism
follower stud
four-legged friends
gailliard
gas seep
goes down the drain
golfdom
heavy tail
high pressure adjusting spring
hollow-point
home reservation
humariaceous
indicating potentiometer
ironless armature
isopia
jet channelling
kirchoff's law
metallocarboxypeptidase
micro-fiche
milky tea
mistaker
moity wool
multiplication of determimants
navigation system
NAVMEDATASERVCEN
neoprene sponge
nine-tracks
nodi lymphatici cervicales anteriores
oftmentioned
on maturity
on roder
osteohalisteresis
outer iteration
output of column
Pahārikhera
paramyoclonus multiplex
pda-based
perrutenate
personal supremacy
photoconductive thermal-plastic polymer material
phyllosticta amorphophalli
picoeukaryotes
plavacridin
polar positioning system
pterolophia lineatipennis
Putnam, Rufus
radioactive pericarditis
reckon sth up
Rhododendron noriakianum
ripeful
scintillatio albescens
self-ionization spectroscopy
stwe
Sulzbach an der Murr
swallow
Taitzehoia
technomic
trophic linkage
vascular glands
Viterbi decoder
vitriate
waltz turn
warns
wide-sense stationary random process