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【一】:lack用法
lack,lack of 和a lack of的具体区别近义词区别
1 lack, vt, 直接加宾语, He lacks confidence to write in English. lack, 也有vi的时候, 这时一般是lack in+宾语, 构成be lacking in… He is lacking in money.
2 a lack of, 一般泛指的时候用, lack, n, 缺乏;
there is a lack of... 缺乏,,,
3 lack of, 一般前面都会有限定词的, 再有就是固定搭配, 前面不用a, 如lack of water.
He can not buy it because of (his) lack of money. 他因缺钱买不起这个; (Habitual) lack of care. 习惯性的缺乏关心;
(The) lack of rain made... 雨水的缺乏使得... 这里用the来限定了.
lack,lack of 和a lack of的具体区别 :
1) Lack : n. 缺乏,不足. vi. 缺乏,短少.
例句 : 1) The school has no lack for applicants.
学校不缺申请者.
2) The lack of a license was pinching me.
没有执照我感到很棘手.
3) Lack of rest .
缺乏休息.
2) Lack of sth : 缺乏
例句 : 1) The flowers are wilting for lack of water.
这些花因缺水而渐渐枯萎.
2) The flower languished from lack of water.
花因缺水而枯萎.
3) A lack of : adj. 缺少.
例句 : Stress and tiredness often result in a lack of concentration.
压力和疲劳常导致注意力不集中.
***********************
A) Lack of 和 a lack of 的 区别:
Lack of 的lack 是动词, a lack of 的lack是名词.
例句 : "蒙古缺少水"----
1) Mongolia lacks of water .
2) Or " There is a lack of water in Mongolia."
B) Lack 和 A lack of 的 区别:
兩者 都可以当缺少, 缺乏讲；只是前者是动词, 后者的lack是名词. Lack
作动词时, 还可以用be lacking in句型 .
例句 : 1) He lacks money.
他没有钱.
2) He has a lack of money.
他缺少钱.
3) She seemed to be lacking in frankness.
她似乎不够坦率.
【二】:lack的用法
Lack 的用法
n.（名词）“不足”。 通常用 “lack+of＋名词”。
①A deficiency or an absence: 缺乏或没有；
②Something needed or wanted. 欠缺的事物：缺乏或寻求的某物
a lack of money. 缺乏金钱
Her only problem is lack of confidence.
Lack of sleep had made him irritable.
If he fails it won't be for/through lack of effort (= he has certainly tried).
We won't be going on holiday this year - lack of funds, I'm afraid.
He can’t endure the lack of food. 没有食物，他再也坚持不下去了。
vt.（及物动词）缺乏；不足；没有
①To be entirely without or have very little of.缺乏：根本就没有或仅有一点 ②To be in need of.需要
He just lacks a little confidence.
What we lack in this house is space to store things.
She lacks patience in dealing with children. （与孩子打交道她缺少耐心。） We are lacking three members of staff due to illness.
(注：说lack不用于进行时是站不住脚的)
vi. （不及物动词）还可作“缺乏，短少；不足；需要。常用进行时
①To be wanting or deficient:缺乏：处于匮乏或不足状态：
You will not be lacking in support from me.你将得到我的帮助
（注：这里把lacking处理为vi.，并没有作为adj.来得简单）
②To be in need of something:需要：需要某物：
I lacked for nothing.我不需要任何东西
She does not lack for friends.
They lacked for nothing.他们无所需求（应有尽有）。
[用法拓展]
lack 构成的短语有：
be lacking:欠缺、缺：
be lacking in缺乏（某种品质、特点等）,不够
lack for 缺（多用于否定句） Lack+of＋名词： The plants died for lack of water.
Lack+名词： We lack the strength to walk any further.
短语： be lacking:欠缺、缺： Money was lacking to complete the building.
Be lacking in缺乏（某种品质、特点等）,不够： He is not lacking in intelligence. Lack for 缺（多用于否定句） She does not lack for friends
lacking adj.www.shanpow.com_lack用法。
1 be lacking If something that you need is lacking, you do not have enough of it:
Enthusiasm has been sadly lacking these past months at work.
Money was lacking to complete the building.
He is lacking in courage. 他缺乏勇气。
Nothing is lacking but the will.什么都不缺，就缺意志。
2 be lacking in sth to not have a quality:
He's totally lacking in charm.
He is not lacking in intelligence.
Philip was not lacking in ability. （菲力普并不缺少能力。）
His reception of us was lacking in warmth.（他对我们的接待缺少热情。）
Since she is young, she is lacking in experience.由于年轻，她缺乏经验。
[练习]
1. Many of our young workers ___ proper training.?
A. are lacking in B. are lacking C. lack for D. lack in [A]
2. We tried to settle the problem with them as soon as possible, but they seemed to____ sincerity.
A. lack of B. be lack of C. lack in D. be lacking in (D)
3. Though________ money, his parents managed to send him to university.
A. lacked B. lacking of C. lacking D. lacked in
<解答> Though lacking money是Though they are lacking money的省略句，其中lack是vt.。
4. Keep him at arm's length, as he is a guy being lacking ______ honesty.
A. of B. on C. in D. about (C)
5.That was another example of _____ experience.
A. a lack of B. lack from C. their lack for D. their lack of
<解答>.D lack作及物动词时，后面直接用名词或代词做宾语；作不及物动词时常和for连用；作名词时常和of搭配使用。
6. -- What caused the failure of the experiment?
-- _____. (C)
A. Because of shortage of fund B. For lack of fund C. Lack of fund D. Due to lack of fund
7. The boss praised the young man for his hard work, though he ____ experience.
A. is lack of B. is lacking in C. lacks of D. is lacking of
此题答案选B，be lacking in是习语，意为“缺乏”，其后通常接experience, frankness, courage等抽象名词。选A是错误的，因为lack可用做名词和动词，但不用做形容词；选C是错误的，因为lack用做动词时，它是及物动词，其后不用介词(注：用做名词的 lack后可接介词of)；选D是错误的，因为没有be lacking of这个搭配。
8. I'm sorry, We're ________that kind of trousers. Would you come back next week?
A. short B. lacking C. in need D. short of （D）
[案例1.]
1. He can’t endure the lack of food.
2. He can’t endure a lack of food.
3. He can’t endure lack of food.
Are they all correct?
Yes, they are, but number 3 would not be heard very often, simply because it's not so easy to say smoothly. You need a hard stop between "endure" and "lack," so even if you mean to say that, it tends to come out as "endure-uh lack."
[案例2.]
The authorities declared that because of the war petrol was _____ and had to be rationed (定量供应).
A. inadequate B. rare C. lacked D. scarce
[答] D. scarce. 汽油供不应求，因此必须定量配给。
Scarce(=not available in sufficient quantity, not equal to the demand)不充足的，缺乏的，供不应求的。Inadequate 不适应的，不充分的。
lack vt./vi. (=be without ; not have; have less than enough of) 缺乏；没有；缺少，例如：
1）He lacks perseverance.(他缺乏坚定性。)
2) Money is lacking for the plan.(此计划尚缺钱。)
3) He is lacking in courage.(他缺乏勇气。)
be lacking in 常指缺乏某种品质、特点等。
lack作及物动词时，一般不用被动语态，故不能选C. lacked.
4)They lacked for nothing.(他们什么也不缺。) 有人认为，lack for是美国英语。
[案例3.]
I am lacking of practice or I am lacking practice.
BE：正常表达的方式是:
"I haven't given a massage for a long time. I'm out of practice."
If you want to use the verb "to lack":
"I lack practice" or I'm lacking in practice".
[案例4.]
1. Lacking money, he couldn't spend his holiday in Shanghai this summer.
2. Lacking in money, he couldn't spend his holiday in Shanghai this summer.
Q：这两句是否都对？
答：１句对(lack sth.)；２句错（但语法结构并不错be lacking in sth.）.
句２类似结构的关键是 be lacking in + quality
Lacking in courage, he would never leave home.
Totally lacking in charm, he could not attract the audience.
注：However, this is still not very idiomatic. I would expect:www.shanpow.com_lack用法。
Because he was lacking in courage, he never left home.
[注意事项]
1．There is no lack of … 总用is/was单数形式
2．For lack of 里没有the
【问题探究】 He is lack of money.
问：lack 是名词，这里似乎是不能放be动词后的吧？
答：That’s water.名词有时也能用在be动词后。这似乎有些题外了。当然本题句是错误的，
下面的都对：
1. He lacks money [lacks = verb]
2. He has a lack of money [lack = noun]
3.He is lacking in money [lacking = adjective]
"He is lack of money." （X）
"He suffers from a lack of money/confidence /personality/etc." ("Lack" = noun.) （V） "I can't meet you today for lack of time." ("Lack" = noun.) （V）
"Lacking" 可以是adjective, 常用于be lacking in sth. 结构。且那sth.应该是抽象的事物，故上面的句3也错误了。
题目句是错的。可以说: "He is lacking money" 或 "he lacks money". 如果说 "He is..." (如 "He is a teacher") 那么就是在描述他什么, 也就是他自己不能是(a lack) < he cannot himself be 'a lack'>
有时人们把lack用与这样的句子，如 "He lacks common sense/initiative". 'To lack' 是个很华丽的古英语动词, 但现在人们也许更可能用 "He has no...".
【三】:lack的用法和短语例句
lack有缺乏;无等意思，那么你知道lack的用法吗?下面跟着小编一起来学习一下，希望对大家的学习有所帮助!
lack的用法：
lack的用法1：lack的基本意思是“缺少”“缺乏”,指某物完全没有或有而不足,所缺之物可好可坏。lack也可用于抽象事物,指缺少某种品质或某物缺少某种性质、特点。如character, training, imagination, tact, individuality, evidence, money, strength, courage, interest, humour 等。
lack的用法2：lack是表示状态的及物动词,不用于被动结构,也不用于进行体。
lack的用法3：lack后接介词for,表示缺乏什么或在某方面缺少,常用于否定句,是正式用语,该短语多用于一般时态,隐含“并非完全没有”之意。
lack的用法4：lack的现在分词lacking常用作形容词,在句中作表语。其后接介词in引起的短语,表示“在(抽象事物方面)缺乏…”。
lack的用法5：lack用作名词时基本意思是“缺乏,不足”,不可数,只用作单数形式,其前面加不定冠词a,常与介词of连用。
lack的常用短语：
用作动词 (v.)
lack for (v.+prep.)
be lacking
用作名词 (n.)
by lack of
for lack of
from lack of
the lack of
lack的用法例句：
1. Lack of exercise can lead to feelings of depression and exhaustion.
www.shanpow.com_lack用法。 缺乏锻炼会导致抑郁和疲劳。
2. Despite his lack of experience, he got the job.
他虽然经验不足，但还是获得了这份工作。
3. There's a lack of fussiness about the way he works.
他工作时不会过分注重细节。
4. She wrinkled her nose, piqued by his total lack of enthusiasm.
她皱皱鼻子，为他毫无热情而感到不快。
5. There's always a lack of consistency in matters of foreign policy.
外交政策总是缺乏连贯性。
6. Despite its lack of formal power the nobility was not powerless.
尽管没有正式的权力，贵族阶层并非没有权势。
7. We like him for his honesty, his lack of pretension.
我们喜欢他的诚实、不浮夸。
8. McKen criticises the lack of explication of what the term "areas" means.
麦肯批评说对“区域”一词的含义缺少解释。
9. His lack of experience may prove to be his undoing.
他缺乏经验可能会最终导致他的失败。
10. There is, he said, a lack of an integrated national transport policy.
他指出，目前缺乏一个统一的全国交通运输政策。
11. She completely mishandled an important project purely through lack of attention.
她之所以彻底搞砸了一个重大项目纯粹是因为不够上心。
12. St Barth'sstrange lack of street names is meant to dissuade journalistic snoopers.
圣巴思这个地方非常奇怪,街道居然没有名称,其实这样做就是为了打消记者刺探新闻的念头.
13. Most people here cannot borrow from banks because they lack collateral.
由于拿不出东西作为抵押，这里大部分人无法从银行贷款。
14. The lack of a decent education did not defeat Rey.
缺乏良好的教育并没有挡住雷伊。
15. He was later criticised for his lack of foresight.
他后来被指责缺少先见之明。
【四】:常用介词的分类及用法
介词又叫前置词，是一种虚词。介词分为三种，一种是简单介词，如 at, in, on, beside, to , for 等;另一种是短语介词，即由两个以上的词组组成的短语，in front of, because of, out of, instead 如 of 等;还有一种二重介词，如 until after, from behind 等。
(一) 介词的句法功能：介词不能独立在句中做成份，介词后必须与名词、代词、或动名词构成介词短语在句中充当 一个成份，表示人、物、事件等与其它人、物、事件等之间的关系。
1、 作定语： The book on the table is mine.
2、 作状语： have breakfast at seven. We (表时间)They were late for meeting because of the heavy ; rain.(表原因) ;They started the machine by pressing the button.(表方法)
3、 作表语： My dictionary is in the bag.
4、 作宾语补足语： I found him in the office.
(二) 1.表示时间的介词
(1) in表示“在某一时间段”或“在某一时候”，如用在月、季、年份、时代、世纪等时间名词的前面，或用来泛指一天的某一段时间。in也可以指“在……之后”，表示从说话起的若干时间内。
如： in July/summer/2000/ancient times
The bus will be here in ten minutes.
(2) on表示“在特定的某一天”，也可用于带有修饰语的一天的某个时间段之前。如：on Saturday, on Saturday morning, on the morning of August 1st
(3) at表示“在某一时间点”，或用来表示不确定的时间和短期的假日、时节等。
如：at six o'clock, at Easter
(4) over, through (out)两者均指“经过的全部时间”。
如：Stay over the Christmas.
(5) for与since：for表示动作或状态延续的全部时间长度，为“长达……”之意;since用于指从过去特定的某个时刻到说话时为止的一段时间;含有since时间短语的句子要用完成时，但含有for时间短语
的句子不一定要用完成时。
如：I have been there for six years.
We have not seen each other since 1993.
(6) during指“在……时期/时间内”，必须接表示一段时间的词或词组作宾语。
如：She was ill for a week, and during that week she ate little.
2.表示地点的介词
(1) above, below，over, under，on, on top of, beneath, underneath: above和below分别表示“高于”和“低于”的意思，不一定指垂直方向上的上下;over和under分别表示垂直方向上的上下
或高低;on/on top of和beneath/underneath表示“和表面相接触”意义上的上下。以上三组介词互为反义词。
如：The temple stands on top of the hill.
The pen is beneath the book.
There is a lamp on the desk.
(2) at, on, in：at指小地点或集会场合;on表示线或面上的位置;in表示在立体、区域或环境内，特别是那些较大，能够容纳相应事物的环境。
如：He works at Peking University.
Your radio is on the desk.
He's sitting in the sun.
(3) between与among：between用来说明“在……两者之间”或“三个以上人或事物中的每两者之间的相互关系”;among用来说明“在……三者以上之间”的相互关系;among可以用来表示没有确定数目的物体之间的相互关系。
如：There is a small river between the two villages.
The book is the best among these modern novels.
The relations between various countries are very important.
3.表示原因的介词
(1) for常常表示褒贬、奖惩的原因或心理原因。
如：They will reward you for your help.
(2) from和out of常常表示动机或原因;through表示消极或间接的原因。
如：He feels weak from lack of sleep.
He broke down through overwork.
4.表示目的的介词
for和to都可以引导目的地。for表示拟定的接收人或目的，for跟在含有出发或开始意义的动词后，如：leave, set out, start, depart, sail等;to表示实际的接收人或目的，to跟在含有方向性的动词
后。
如：go, come, run, walk, move, fly, drive, ride等。
如：We have left for Hong Kong.
He flew to America via Hong Kong.
5.表示“关于……”的介词
一般about用于比较随便的谈话或非正式的文体;on用于正式的讲话、著作或报告中;of用于动词talk, read, know, hear等的后面。
如：What are you talking about?
in terms of natural resources
6.表示原料的介词
of和out of表示制成品的材料仍保持原材料的性质;from表示制成品已失去了原材料的性质。
如：His house was built of brick.
He made these toys out of old cigar-boxes.
Steel is made from iron.
7.表示价格的介词
at和for都可表示价格，at仅表示价格;for还表示“交换”。
如：Eggs are sold at 95 cents a dozen here.
I bought it for five pounds.
【五】:prevent的相关用法
下面小编为大家带来prevent的相关用法，欢迎大家学习：
prevent vt.
1.防止;预防：
These rules are intended to prevent accidents.
这些规则旨在防止事故发生.
2.阻碍;妨碍：
Unless we get more funding we'll be prevented from finishing our experimental programme.
除非我们得到更多的拨款,否则就会妨碍完成这项试验计划.
3.阻止;阻挡(from):
The rain prevented us from playing football.
雨使我们不能踢足球了.
4.【宗教】引领：
God prevents us.上帝引领我们.
5. 妨碍;阻止：
If nothing prevents如果没有阻碍的话
以下是prevent的双语例句：
1、Unlike drugmakers, supplement manufacturers cannot make claims that their products will cure, mitigate, treat, or prevent a disease.
与药物生产商不同，补充剂生产商不可以宣称他们的产品能治疗、减轻或预防疾病。
2、Further treatment will prevent cancer from developing.
进一步的治疗将阻止癌症恶化。
3、But he will lack the supermajority required to prevent Republicans from using a parliamentary maneuver, known as a filibuster, to block legislation.
不过，他将不会拥有防止共和党使用冗长讲话所需的“特别多数”优势。冗长讲话是议员们使用的一种策略，可以被用来阻挠议案的通过。
4、The best way is to prevent disease.
预防疾病才是上策。
