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nec·es·sar·y 英ˈnesɪˌseriː美ˈnɛsɪˌsɛriAHDnĕsʹĭ-sĕr'ē ★★★★☆小中高牛４研COCA¹⁰⁹⁹BNC⁴⁴⁹iWeb⁸²⁶Economist¹⁵⁸²
基本双解英英易错辨析词源搭配短语记法近义反义句型派生词用法例句Thesaurus例句
adj.必要的⁸³;必然的⁸n.必需品⁹名词复数necessaries
adj.形容词
必要的,必需的essential for a purpose; that cannot be done without or avoided 必然的,不可避免的that must be; inevitable
Noun:
anything indispensable;food and shelter are necessities of life the essentials of the good life allow farmers to buy their requirements under favorable conditions a place where the requisites of water fuel and fodder can be obtained
Adjective:
absolutely essentialunavoidably determined by prior circumstances;the necessary consequences of one's actions
adj.形容词
我必须在7点以前完成作业。❌ I am necessary to finish my homework before seven o'clock. ✔️ It is necessary for me to finish my homework before seven o'clock. 析 表示“某人必须做某事”时,须用It is necessary for sb to- v 结构。
adj.形容词
necessary, essential, needful, requisite这组词都有“必要的”“必需的”意思。其区别是： 1.necessary为常用词,多指总体上长期而言的需要; needful常指近期或眼下所需; essential含有缺少某一因素便不能运转、生存的意思; requisite常指某一具体任务中所需的具体东西,否则就会影响任务的完成。例如: The were the instruments needful for his work.那是他工作所需要的工具。
We can live without clothes, but food and drink are essential to life.没有衣服我们可以生存,但是食物和水是维持生命所必不可少的。
Past experience is requisite for the job.过去的经验是做这工作的必要条件。2.语气上, essential比necessary强; requisite是正式用语。 3.necessary和essential用在主语从句中时要用“should+ v. ”。 indispensable，essential，necessary，requisite这些形容词均有“必不可少的、必需的”之意。 indispensable语气强，侧重指绝对必要性或不可缺少性。 essential指对事物本身性质具有决定性的重要性，暗含不可缺少，否则便无法存在。 necessary最常用词，侧重由客观因素决定的某种需要，强调不可避免，但并非绝不可缺少。 requisite正式用词，特指为实现某一目的或得到某种结果而应有的需要，有时可与necessary换用。 ne-,无，没有，不能，词源同no,-cess,走，离开，词源同cede,concession.即不能走的，不能离开的，引申词义必不可少的，必需的。
用作形容词 adj.
～+名词necessary actions必要措施necessary apologies必要的道歉necessary arrangements必要的安排necessary end必然的结局necessary equipment必要的装备necessary information必要的信息necessary instruments必要的仪器necessary makeshift必要的权宜之计necessary restriction必要的限制necessary result必然的结果necessary skill必需的技能necessary sum所需的数目副词+～absolutely necessary绝对必要highly necessary非常必要的really necessary真的必要～+介词necessary for对…是必要的necessary for health对健康是必要的necessary to对…是必需的
用作形容词adj.a necessary evil不得不认可的不合意甚至有害的事物 thing that is undesirable and possibly harmful but must be accepted for practical reasons 钱博士ne=no，不+cess走开+ary形容词后缀→不能离开的⇒必需的，必要的
词根ced-走，走开来自拉丁语，过去分词形式及反复动词形式为cess-。非常记忆ne哪〖吒〗+ces厕所+sa阿Sa+ry人妖⇒哪吒必需在厕所才能把阿sa变人妖ne=no，不+cess走开+ary形容词后缀→不能离开的⇒必需的，必要的。近义词 neededrequiredessentialimportant反义词 unnecessary
用作形容词adj.
用作定语
～+ n.My money came short of the necessary sum.我的钱不足所需的数目。
Do you have the necessary skills for this job?你具备做这项工作所必需的技能吗?
They joined the wires and made the necessary new connection.他们把电线接了起来,接通了所需的新线路。
I'll leave it to you make the necessary arrangements.我将让你作出必要的安排。
The lawyers will draw up all the necessary papers.律师们将拟定出所有必要的文件。
No one foresees how the necessary restriction of the population will be effected.任何人都无法预知将如何实现对人口的必要限制。
They will meet in Beijing to debate taking necessary actions against environmental pollution.他们将在北京会晤并讨论采取必要措施防止环境污染。
用作表语
S+be+～A year's guarantee on the television set for all repairs might be necessary.必须为电视机提供为期一年免费修理的保单。
A climber must learn to discriminate as to when compass bearings are necessary and when they are not.一个登山者必须学会辨别什么时候需要罗盘测定方位,什么时候不需要。
Under certain conditions, answering back sarcastically is necessary.在某种情况下,反唇相讥是必要的。S+be+～+ prep .-phrasePatience and understanding are necessary for a teacher of infants.耐心和理解是幼儿教师必不可少的。
What is necessary for one person is not always necessary for another.对某人来说是必需的东西,对别人则未必如此。
These reference books are necessary to scientists.这些参考书是科学工作者所必需的。
Sleep is necessary to one's health.睡眠对健康是必要的。It is/was+～+for sb to- vIt was necessary to jump on the ice coated mounds of brush several times before they could flush.你得在这些被冰覆盖的树丛上跳上好几下,才能把它们惊起。
It's necessary to raise wages on the basis of increasing production.需要在增加生产的基础上增加工资。
Because the company was doing more business, it was necessary to expand the factory.由于公司业务的扩大,扩大工厂是必然的。
It was necessary to retire several generals who lacked energy and enterprise.使几位缺乏精力和上进心的将军解职是必要的。
It is sometimes necessary to indulge a sick child.迁就一个生病的小孩有时是必要的。
It is both important and necessary to note this difference.注意到这个差别是重要的和必要的。
Is it really necessary for me to attend the meeting?我真的必须出席会议吗?
It's necessary for us to net the currant bushes.我们有必要用网盖上红醋栗树。
It is necessary for them to decide on which type of fuel is most suitable.他们必须决定哪一种燃料最合适。It is/was+～+that-clauseIt is necessary that everyone be there in time.大家都按时到达那里是必要的。
It's necessary that young and old people should communicate more with each other.年轻人和老年人有必要保持更多的联系。
用作宾语补足语
S+V+O+～We consider it necessary that the machine should be oiled regularly.我们认为机器必须定期加油。
This has made it necessary for agriculture and industry to develop very quickly.这就使得工农业必须飞速发展。
I felt it necessary to speak about our shortcomings.我觉得有必要谈谈我们的缺点。
Some students hold it necessary to be able to speak English.有些学生认为能讲英语是非常必要的。其他The National People's Congress holds one session each year. Whennecessary, the session may be advanced or postponed.全国人民代表大会每年召开一次会议,必要时,会期可以提前或推迟。
Ifnecessary, the heavy machinery can be brought into action.若有必要,可以使用重型机械。
Ifnecessary,I'll go there again.如有必要,我会再去那里的。Punnecessarya.不必要的
adj.形容词
necessary用作形容词时,表示“必要的,必然的”,一般指在概念和逻辑上所要求应该做的,本身包含着“既不可少,又不可避免的”的意思。作“不可避免”解时,常用于a necessary evil习语中。 necessary可用作定语、表语或宾语补足语。necessary一般不用表示人的名词或代词作其主语,而通常要用it作形式主语。 It is necessary可以接由that引导的主语从句,从句中的谓语动词一般要用虚拟式多为动词原形。 有时为了使句子意思完整, necessary可以同if, when连用,用作插入语。
形容词98%,名词2%
用作形容词She will makenecessaryarrangements.她会作好必要的准备。
Ifnecessary, please warehouse the goods.如有必要，请将该货存入仓库。
Thenecessaryoutcome of a war is a fall in production.战争带来的必然结果就是生产力下降。adj.essential
同义词 basic,crucial,decisive,essential,fundamental,imperative,indispensable,mandatory,needed,paramount,required,significant,unavoidable,urgent,vitalbinding,cardinal,chief,expedient,prerequisite,pressing,prime,principal,requisiteall-important,bottom-line,compelling,compulsory,de rigueur,elementary,exigent,incumbent on,momentous,must-have,name of game,needful,obligatory,quintessential,specified,wanted
反义词 additional,extra,inessential,minor,nonessential,optional,secondary,trivial,unimportant,unnecessary,voluntary,insignificantcontingent,needless,uselessadj.inevitable
同义词 certain,imminent,unavoidableassured,fated,ineluctable,ineludible,inerrant,inescapable,inevasible,inexorable,infallible,returnless,undeniable,unescapable
反义词 doubtfulcontingent,inessential,needless,optional,unimportant,unnecessary,useless,voluntary
automaticadjective occurring as natural consequence
assured,certain,inescapable,inevitable,routine,unavoidable
basaladjective basic
beginning,easy,elementary,fundamental,initial,lowest,necessary
basicadjective elementary, fundamental
basal,capital,central,chief,elemental,essential,indispensable,inherent,intrinsic,key,main,necessary,primary,primitive,principal,radical,substratal,underlying,vital
bottom lineadjective of key importance
cardinal,critical,crucial,essential,fundamental,important,indispensable,necessary,underlying,vital
compulsoryadjective binding
compulsatory,de rigueur,forced,imperative,imperious,mandatory,necessary,obligatory,required,requisite
crucialadjective critical, important
acute,bottom-line,central,clamorous,climactic,compelling,deciding,decisive,desperate,dire,essential,hanging by thread,high-priority,imperative,insistent,momentous,necessary,on thin ice,pivotal,pressing,searching,showdown,touch and go,touchy,urgent,vital Do they have the necessary skills to support the solution?
他们有支持这个解决方案的必要技术吗？ ibm
Do you have the necessary skills?
我具有必要的技能了吗？ yeeyan
A certain degree of speculation should not only be allowed but also necessary.
一定程度的房地产投机不但应该允许，而且是必要的。 yeeyan
All that is necessary as well, but it is beyond the scope of this process.
所有这些问题都是必要的，但其并不在此流程的范围之内。 ibm
But beyond what is necessary for these purposes, there will be no invasion, no using of force against or among the people anywhere.
但为了这些目标所必须的之外手段将不会涉及，政府也不会使用强制力量反对或离间任何地方的人民。 yeeyan
But still I wonder whether all the control is necessary.
不过我还是怀疑所有这些控制是否必要。 kekenet
Constant vigilance is necessary in order to avoid accidents.
为了避免意外事故，必须经常保持警惕。《新英汉大辞典》
Gossip— or the fear of gossip— may in this way serve to enforce the social norms that are necessary for any group to exist.
闲话——或者对闲话的担心——以此方式来执行某些社会准则，这些准则对任何一个群体的存在都是必需的。 yeeyan
I am rugged, not because it is easy, but because it is necessary and I am up for the challenge.
我很坚固，不是因为这样做简单，而是因为这是必然之选，而且我已准备好面临挑战。 infoq
I can spook a letter for you, if necessary.
如果有必要，我可以代你写封信的。《21世纪大英汉词典》
I said at the time that this action was necessary, legal and right and I still believe that today.
在那时我说这个行动是必要的、合法的和正确的，我今天仍然相信这一点。 yeeyan
If you manage an office, consider whether all the activities of an office are necessary.
如果你管理着一个办公室你需要考虑是否这个办公室的所有活动都是必须的. yeeyan
In the meantime, let us study things which are no more. It is necessary to know them, if only for the purpose of avoiding them.
在此期间，让我们研究研究那些已经不存在的东西，认识那些东西是必要的，即使仅仅是为了避开它们。 ebigear
It is necessary, I think, to head up the chapters.
我认为给每一章都加上个标题是很有必要的。《21世纪大英汉词典》
It may not be necessary, as I have suggested, but I take no position on that question.
正如我指出的那样，或许是没有修宪的必要的，但我在此不就这一问题表态。 yeeyan
Learning how to“ do more with less” becomes necessary for all businesses at some point in their history.
从过去的某些意义上讲，学会如何“利用较少的资源做更多的事”对所有商家都是必要的。 ibm
No event is necessary for this scope because objects associated with it are released by the garbage collector rather than object managers.
这个范围不需要事件，因为与它相关联的对象由垃圾收集器释放，而不是由对象管理器负责。 ibm
Once you have the necessary information, you can begin with design.
一旦得到了必要的信息，就可以动手设计了。 blog.sina.com.cn
Retrenchment will be necessary.
有必要进行紧缩。《新英汉大辞典》
Some of these interruptions are necessary and others are not.
有些干扰是必需的，其他则不是。 infoq
There’re some professional teachers and they can guide you to do certain necessary exercise.
那里有一些专业的教师，他们可以指导你做一些必要的练习。 hxen
What kind of resources are necessary and in what amount.
何种资源是必需的，以及需要多大的量。 ibm
Why is this necessary?
为什么是必须的？ blog.sina.com.cn
You want your code to be only as complex as necessary.
您想要您的代码复杂性仅仅是您必需的。 ibm |