8. effect是一个名词;the effect of A on B;side effect药物的副作用;the cause and effect of the matter问题的因果关系;come/go into effect; bring/carry/put?into effect
Smoking affects your health.
Smoking has an effect on your health.
The effect of smoking on your health.
Effective有效的，生效的---be effective against对抵抗...有效，efficient效率高的，(人)有能力的
Be deficient in缺少...---Water is deficient in the desert.沙漠里缺水
Be proficient in?对...熟练精通---be proficient in driving (a car); proficiency in
Benefit可以做名词和动词
For the benefit of为...的利益---We all chipped in for the benefit of the orphans.
Benefit做动词”有益于”时是一个及物动词---The new highway will benefit the village people.
Benefit做动词”受益”时是一个不及物动词后面要加from，by---The village people will benefit from the new highway.
9. succeed in (doing)sth; fail(to do) sth
10. 成为牺牲品---fall a victim注意不要加into
11. offspring单复同形
12. be famous for以...出名He is famous for his learning.
Come to/achieve fame成名;world-wide fame
13. Fancy有名词，动词，形容词等多种形式----a fancy tie一条别致的领带，fancy diving花样跳水;fancy做名词”爱好，喜爱，迷恋”时只用单数take a fancy to---But the fact is that we have been so fascinated by him as to take a fancy to him.
Fancy在做动词时和imagine一样，都要加动名词---I can’t fancy/imagine his telling a lie.
14. further除了做形容词，副词外，还可以做动词---further the cause of peace:增进和平
15. as sure as fate必定;go to one’s fate送死;a fateful decision关系重大的决定
16. find fault(with)--- Indeed, it is hard to find fault with most of the items on the good governance agenda.
In default of缺少---He was acquitted in default of strong evidence of his guilt.;He was silent in default of any excuse.
17. favor有两个形容词favorable有利的，赞成的，有帮助的;favorite喜爱的或喜爱的人或物(兼具形容词和名词)
John is a great favorite with his grandmother.
The weather is favorable for our voyage.
He received a favorable reply to his application.
18. fear既是动词也是名词;for fear (of doing)/that---He didn't answer for fear of hurting her.; He walked fast for fear that he should be late.查出来的例句that后面多用 should或may，might
fearful和afraid一样后面多用of doing
19. feel like +doing想要(一般用于否定或疑问句中)---I don’t feel like eating now.
20. finding的复数findings表一调查的结果后面的动词也用复数The findings show that he is guilty.
21. finish doing
22. confine?to/within是局限于，限制---After all, home is not confined within the walls of one's own flat.
Definitive决定性的，最后的
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1. He is a clerk with a firm.不是of a firm
2. fit在做形容词时候有两个意思，一个是健康，强健的，that’s why he is so fit.另一个意思是合适的，恰当的，He is fit for the job=He is fit to take the job.
虽然fit有(使)合适，(使)吻合，但是不能说The job fits him.因为fit做动词主要用于尺寸上的合适和吻合，比如The dress fits you well.这是可以用的
Every shoe fits not every foot.---fit主要用来形容尺寸大小合适
No dish suits all tastes.----suit主要用来形容合乎条件，身份，口味，需要
3. influence可以是名词或者动词，主要指潜移默化的影响，而affect却表示对事物产生不良影响.
effect/influence (up)on; to influence/affect=to have an influence/effect on
3. Time flies.光阴似箭;the flight of time 时间的飞逝
4. feed on以...为食Horses feed on grass.
Feed sth to sb=feed sb on/with sth
5. make an expedition; go to an expedition
6. forbid后面可以接很多形式forbid sb to do sth=forbid sb doing sth=forbid sth=forbid that; forbid that 后面要使用虚拟语气should
to bid on/for a bridge意思是投标承建桥梁
7. force的复数forces才是职军队
8. force sb to do sth, force sb into doing sth
They forced me to obey the order. They forced ,e into obeying the order.
Put a law in force---实施法律
Force的形容词有两个，一个是forceful强有力的，另一个是forcible强迫的，强暴的
Enforce是动词，既有实施，执行的意思，也有强迫，强制的意思(后面要加on/upon)，所以如果理解为”强加”可能更好
Enforce a law; They enforce obedience up(on) me.
Make an effort=make efforts; redouble one’s effort再接再厉;without effort毫不费力
9. conform是一个不及物动词，conform to意思是遵从，是主观意识行为;conform with是顺应，是无意识的客观结果
formula for water水的分子式，不是of
10. reform the system of society改革社会制度;reform a person使人改过自新
inform在做通知的意思的时候是及物动词 inform sb of sth---Actually, it is your duty to inform him of the board 's decision .
inform 在做告发，检举的时候是不及物动词，所以要加against/on;inform against/on sb---They decided to inform against him.
11. try one’s fortune碰运气;tell one’s fortune算命;make a fortune发财，致富
be fortune to do sth=be fortunate in doing sth
I am fortunate (to have)/having a good wife.
12． a story founded/based on facts基于事实写成的小说，注意facts不是fact
The fund for research研究基金，funds资金，fund基金
A profound doctrine深奥的学说;a profound scholar渊博的学者
Profundity注意拼写，不是profoundity，意思是深奥，其复数profundities意思是奥妙之事
13. free在做大方的意思时，用with---be free with money;在做免费的，免税的，无...的意思时，使用from或of---free of taxes; free from care
此外free还做动词和副词，副词意思是免费地，而freely意思是自由地，随意地，所以travel free和travel freely意思是不一样的
14. make friends with(与...)交朋友;be friends with与..要好;
friendly是一个形容词，不是副词，friendly with意思是要好，friendly to是对...友好
I am friends with A=I am friendly with A.我和A很要好.
I am friendly to A.我对A很友好
15. be confronted with=be faced with 面临，遇到;to confront difficulties勇敢地面对困难
To confront sb with?使某人面临...But then life moves along to confront us with realities
The frontier of medicine医学尖端
16. furnish A with B; furnish B to A---提供;如果做装备的意思，只能用furnish A with B
17. generalize概括，归纳，推断---to generalize a conclusion总结出结论