US组词单词

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1) dis(not, the opposite of) disadvantage, dislike, disagree, disappear, disarm,
2) 2) in- (not, in, into) inability, incorrect, inability, incapable, indirect,
inhuman, injustice, informal, inside,
3) im- (not, in, into) impossible, imbalance, immature, immoral, impatient,
implicit , impress, impression, import, immigrate, imprison, immerse
4) il- (not) illegal, illiterate, illogical ir- (not) irregular, irresponsible,
irrespective
5) un- (not) unable, uncover, undo, undoubtedly, undress , uneasy, unemployment ,
unexpected, unfold , unfortunately, unimportant, unlike, unload, unusual, unaware,
enlightened, unparalleled, unsustainable,
6) non- (not) nonsmoker, nonexistence, non-cooperation, nonstop, nonmetal,
noesident, nonsense, nonfundamentalist, nonspecialist
7) mis- (wrong, wrongly) mislead, misspell, misstep, misfortune, misuse,
misguided, misinformation
8) de- (showing the opposite, to remove, to reduce) deform, deface,
demobilize, destruction, deforest, depress, decode, decrease, degenerate ,
degrade , descend,
9) pre- (before, in advance) pre-historic, precaution, precede , preclude ,
predecessor , predict , preface, premature ,
10) ante-, (before, in advance) anteroom, ante-christian, antemeridian,
anticipate, antique
11) fore- (in advance, before, in or at the front) forearm, forehead, foreman,
foretell , foresee , forefather , foreleg, forerunner , fore , foremost, forecast,
forewarn
12) ex- (out, out of, former) ex-minister, ex-president, ex-soviet union, ex-wife,
export, exclude, ex , exit, exotic , expel , express, expression, extend, extension,
extensive, external, extinct, extra, extract
13) post- (later than, after) postgraduate, postwar, postmeridian, postpone,
postscript
14) sub- (under, below, less important) sub, subject, subway, subtitle, subdivide,
submarine , subordinate , subscribe ,subsidiary , subsidy , subtract, suburb,
15) infra- (below in a range, beyond) infrastructure , infrared
16) re- (again, back to a former state) react, reaction, recall, respect, respond,
response, responsibility, responsible, restore, resume, return, reunion , revise,
18) inter- (between, among) interchange, interchangeable, interdependent,
interpersonal, interview, interact , interaction, intercourse , interface ,
interfere, interference, internet, interrupt, interval, intervene
19) macro- (large) macroeconomics , macrocosm , macrostructure
21) super- (greater or more than) super, supermarket, supersonic , superman,
superpower, supernatural, supervise , superb, superficial, superintendent , superior,
superiority , supreme, supersystem
22) sur- (more than, beyond) surplus, surtax, surface, surpass , surround,
survival, survive, suspect
23) ultra- (beyond, very, too) ultramodern, ultrasound, ultra-violet


24) auto- (of or by oneself) auto, autocriticism, autoland, automobile,
automation , automatic, autobiography , autonomous , autonomy
25) mal- (bad, badly) malfunction, maltreat , malnutrition , malpractice
28) semi-, hemi- (half) semicircle, semiconductor, semi-colony , semifinal,
hemisphere
29) uni-, mono- (one) uniform, unify , union, unique, unit, unite, unity, universe,
universal, university, monologue , monoplane, monopoly , monotone, monotonous ,
carbon monoxide
30) bi-, di- (two) biweekly, bicycle, bilateral , billion, bilingual, dialogue,
carbon dioxide
31) tri- (three) tricycle , triangle, triangular, trilogy , triple, trigonometry
32) quadri-, quadru- (four) quadruple, quadrangle
33) penta- (five) pentagon, pentagon, pentium
34) hexa- (six) hexagon, hexangular mill- (thousand) millennium, millimeter
35) sept- (seven) september, sept-wolves nona- (nine) nonagon, november
36) octa- (eight) octagon, octave, octopus, october 38) deci-, deca- (ten) decade,
decimal
39) centi- (hundredth part) centigrade, centimeter, centipede, century
40) kilo- (thousand) kilo, kilometer, kilogram (me), kilowatt
42) multi- (many) multipurpose, multinational, multiple, multiply,篇二:1单
词用法比较
1.anyone 和 any one
anyone仅指人,any one既可指人,也可指物。
2.no one 和none
a) none 后跟of短语,既可指人又可指物,而no one只单独使用,只指人。
b) none 作主语,谓语动词用单,复数均可,而no one作主语谓语动词只能是单数。 none
of you could lift it. 你们中没有人可举起它。 ---- did any one call me up just now?
--刚才有人打电话给我吗? ---- no one.--没有。3.every 和each 1) 2) 3) 4) 5) every
强调全体的概念, each强调个体概念。 every student in our school works hard. 我
们学校的学生都很用功。 each student may have one book.. 每个学生都可有一本书。
every 指三个以上的人或物(含三个),each指两个以上的人或物 (含两个)。 every 只作形
容词,不可单独使用。each可作代词或形容词。 every student has to take one. each
boy has to take one. each of the boys has to take one. every不可以作状语,each
可作状语。 every 有反复重复的意思,如 every two weeks等; each没有。
6) every 与not 连用,表示部分否定; each 和not连用表示全部否定。
every man is not honest. 并非每个人都诚实。
each man is not honest. 这儿每个人都不诚实。
many,much都意为许多,
many + 可数名词,much + 不可数名词。 how many people are there at the meeting?
how much time has we left? many of the workers were at the meeting. much of the
time was spent on learning
1) 泛指另一个用another。
2) 一定范围内两人(物),一个用one,另一个用the other。
3) 一定范围内三者,一个用one,另一个用one (another),第三个可用the other,a


third。
4) 一定范围内,除去一部分人物,剩余的全部用the others。
5) 泛指别的人或 物时,用others当在一定范围内,除去一部分后,剩余部分但不是全
部时,也用others。
one表示泛指,that和it 表示特指。that与所指名词为同类,但不是同一个,
而it 与所指名词为同一个。
i cant find my hat. i think i must buy one. (不定)
我找不到我的帽子了。我想我该去买一顶。
the hat you bought is bigger than that i bought. (同类但不同个)
你买的那顶帽子比我买的大。
i cant find my hat. i don t know where i put it. ( 同一物)
我找不到我的帽子。我不知道我把它放在哪了。
一、 none 无
1) none作主语,多与of 构成短语 none of。 在答语中,none可单独使用。
are there any pictures on the wall? none.2) none作主语,谓语动词单复数均可。
但如做表语,则其单复数与表语一致。 it is none of your business. 二、few 一些,少
数few 作主语时,谓语动词用复数,多用于肯定句。 三、some 一些1) 可与复数名词及不
可数名词连用。2) 当做某一解时,也可与单数名词连用。(= a certain) you will be sorry
for this some day. 总有一天,你会后悔这件事的。 a certain (some) person has seen
you break the rule. 某些人不同意你的看法。 注意:(1)在肯定疑问句中用some代替any。
(2)some用于其他句式中: a. 肯定疑问句中:说话人认为对方的答案会是肯定的,或期望
得到肯定回答时。 would you like句式中,表委婉请求或建议,如: would you like some
coffee? b. 在条件状语从句中表示确定的意义时,如: if you need some help,let me
know. c. some位于主语部分, some students havent been there before. d. 当否
定的是整体中的部分时,some可用于否定句。如: i havent heard from some of my old
friends these years. 这些年我没有收到一些老朋友的信。 四、any 一些1) any 多用于
否定句和疑问句和条件状语从句中。当句中含有任何的意思时,any可用于肯定句。 here are
three novels. you may read any. 这有三本小说,你可任读一本。
五、one, ones 为复数形式
ones必须和形容词连用。如果替代的名词时无形容词在前,则用some, any,而不 用
ones。
have you bought any rulers? yes,i ve bought some.
比较have to和must
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 very ill, so i had 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 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: dont have to 表示不必
mustnt 表示禁止,
you dont have to tell him about it. 你不一定要把此事告诉他。


you mustnt tell him about it. 你一定不要把这件事告诉他。
比较may和might
1) 表示允许或请求;表示没有把握的推测;may 放在句首,表示祝愿。
e. 表示成功地做了某事时,只能用waswere able to, 不能用could。
he was able to flee europe before the war broke out.
= he managed to flee europe before the war broke out.
注意:could不表示时态
1)提出委婉的请求,(注意在回答中不可用could)。
--- could i have the television on? --- yes, you can. no, you cant. 2)在
否定,疑问句中表示推测或怀疑。he couldnt be a bad man. 他不大可能是坏人。
比较and和or
1) 并列结构中,or通常用于否定句,and用于肯定句。
2) 但有时and 也可用于否定句。请注意其不同特点:
there is no air or water in the moon.
there is no air and no water on the moon.
在否定中并列结构用or 连接,但含有两个否定词的句子实际被看作是肯定结构,因此
要用and。
典型例题
---i dont like chicken ___ fish.
---i dont like chicken, ___ i like fish very much.
a. and; and b. and; but c. or; but d. or;and 答案c。否定句中表并列用or,
but 表转折。 判断改错:(错) we will die without air and water.(错) we cant live without
air or water.(对) we will die without air or water.(对) we cant live without air and
water.
sometime sometimes some time some times
① sometime是时间副词,意为“在某时;有朝一日”。
② sometimes是频度副词,意为“不时、有时”。
③some time可用作名词 词组,用来表示一段不确定的时间;亦可用作副词词组,意思相当
于sometime,常译为“在未来 的某时、经过若干时间”,常用于将来时。
some time sometimes
some time: refers to an indefinite time in the future
some time:将来不确定的某个时间。
examples:
例句:
lets meet for coffee some time.
i dont know when ill do it - but i will do it some time.
咱们改天一起喝个咖啡吧。
我不知道我什么时候会做这件事——不过将来总会做的。
sometimes: adverb of frequency meaning occasionally
sometimes:副词,“有时”
examples: 例句: he sometimes works late. sometimes, i like eating chinese food.
他有时工作到很晚。 有时候我喜欢吃中餐。
一、关于how long的用法
how long有以下两个主要意思:


1. 表示多长时间,主要用来对一段时间(如three days, four weeks 等)提问。如: a:
how long did he stay here? 他在这儿呆了多久?
b:about two weeks. 大约两个星期。
a:how long does it take to get to london from here? 从这里到伦敦要多长时间?
b:at least ten hours. 至少要10个小时。
2. 表示某东西有多长。如:
a:how long is the river? 这条河有多长?
b:about 500 km. 大约500千米。
二、关于how often的用法
how often 指每隔多久,主要用来对频度副词或状语(如:once a week, three times a
month 等)提问。如:
b:once a month. 每月一次。
a:how often do you visit your mother? 你多长时间看你妈妈一次?
b:once a week. 一周一次。
三、关于how soon的用法
how soon 指再过多久,主要用来对表示将来的一段时间(如:in an hour, in two weeks
等)提问。如:
a:how soon will he be back? 他要多久才回来?
b:in an hour. 1 小时以后。
a:how soon shall we know the results? 我们多久能知道结果?
b:i don’t know. 我不知道。篇三:英语单词的结构
英语单词的结构
什么是词?
词是能独立运用的、最小的、有语义的语 言单位。就其句法功能来说,词可以分为功能
词(function word)和实义词(content word)两类。功能词指的是没有完整词汇意义但有
语法意义 或语法功能的词,包括________、________、__________、________、__ _______、
_________等。实义词指的是本身有完整词汇意义的词,包括_______ ___、_________、
__________、_________等。
英语单词是由字母拼写而成的,可以由一个字母组成一个单词,如______,也可以由45
个字母组 成一个单词,如:(n.肺尘病)。
英语单词的内部结构也不尽相同,让我们来分析以下三组词:
1. book, books, bookish, bookcase
2. tolerate, tolerance, tolerant, toleration, tolerable, intolerable
在第一组词里,book可以再分吗?
在第二组词中,toler
ate
ance
ation
able
in
第三组例词中都有一个共同成分_________, 意思是__________,-phone有声音的意思,
如microphone; -gram往往表示书写或描绘出来的东西,如telegram; -scope表示“观察的
仪器,„镜”,如microscope.
从上面的分 析可以看出,如果撇出能不能独立运用这一点,词就不是最小的有语义的单


位,语言中最 小的“语音和语义的结合体”称为“词素”(morpheme)。上述三组词中,除了
book外,都 是由两个或两个以上的词素组成的。
什么是词素?
二、派生 derivation
注意: -ese, -ian, -ist 既可以构成名词,又可以构成形容词。

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