三、AT
1.动词+ at。at表示“指向某一目标，到达某地”：arrive at抵达, call at访问某地, catch at(it)当场抓住, come at攻击, fire at向…开火, glance at瞟一眼, glare at怒目而视, grieve at忧伤，knock at敲, laugh at嘲笑, look at看一眼, pull at拉扯, rejoice at对…高兴，smile at向某人微笑, shoot at朝…射击, stare at怒目而视, thrust at刺向, tear at撕, tremble at颤抖，wonder at吃惊，work at工作。
例如：
Don’t let me catch you again at it.不要再让我当场逮住你。
We must “shoot the arrow at the target”. 我们必须有的放矢。
They trembled at the sight of the peasant’s spears. 看到农民的梭标，他们阵阵发抖。
2. be +形容词/过去分词+ at。其中at表示“情绪、情感的原因，或对某物具有某种感情”：be angry at恼怒于, be alarmed at对…保持警觉, be astonished at对…吃惊, be bad at不擅长, be clever at对某事很灵巧, be delighted at高兴，be disgusted at厌恶, be disappointed at对…失望，be good at擅长, be impatient at对…不够耐心, be mad at狂热于, be pleased at对…感到高兴, be present at出席, be satisfied at满意, be surprised at吃惊, be shocked at对…非常震惊，be terrified at受到…的恐吓, be quick at对…很机敏。例如：
They were overjoyed at his return to work. 他们对他重返工作感到欣喜。
They are alarmed at the growth of the liberation movement in the colonies. 他们对殖民地日益壮大的解放运动警觉起来。
3.at+名词构成的词组：at a distance在一定距离，at a loss不知所措，at a time一次，at all一点也不，at any cost不惜一切代价，at best最好也只是，at first起初，at hand手头，at heart在内心里，at home在家；无拘束，at last最后，at least至少，at most最多，at once马上，at present目前，at sea不知所措，at times有时，at will任意地，at work起作用，at worst最坏。
4.其它含有at的短语：work hard at勤奋工作，drop in at顺路拜访。
四、FOR
1.动词+for
a)动词+for。for表原因、目的：account for解释；说明, answer for对…负责, apply for申请；请求, apologize for为…而道歉, beg for请求, call for要求, care for在意, enter for报名参加, fight for为…而战, hope for希望, inquire for查询；求见, leave for离开某地到另一地, look for寻找, long for盼望, mistake for误认为, plan for计划做某事, prepare for为…作准备, provide for为…提供, reach for伸手去拿, run for竞选, stand for象征, search for搜寻, send for派人去请, speak for陈述意见、愿望, take for当作, wish for希望, wait for等待。例如：
His illness accounts for his absence. 他因病缺席。
The baby reached for the apple but couldn’t reach it. 那婴儿伸手去苹果，但够不着。
He who would search for pearls must dive below. 要想找到珍珠，必须潜到海底。
b)动词+sb.+ for +sth.。for表示原因或目的：ask for要求得到, blame for因…责备, excuse for宽恕, forgive for谅解, pardon for原谅, pay for花钱买, praise for称赞, punish for对…进行惩罚, push for催逼，reward for酬谢, thank for对…表示谢意。例如：
Please excuse me for my being late. 请原谅我的迟到。
Forgive me for my keeping you waiting. 请见谅，让你久等了。
2. be +形容词+for。for表作用、目的、对人或物有某种情绪等：be anxious for急于做, be eager for渴望, be bad for有害于, be convenient for便于, be good for利于, be famous for以…出名, be fit for适合于, be grateful for对…心存感激, be impatient for对…不耐烦, be late for迟到, be necessary for有必要, be ready for作好准备, be sorry for为…而后悔, be responsible for对…负责, be suitable for适合于, be unfit for不适合, be useful for对…有作用。例如：
He is eager for success. 他渴望成功。
The government is responsible for the nation’s welfare. 政府负责民众的福利。
3.for+名词构成的词组：for all尽管，for a song非常便宜地，for certain确切地，for company陪着，for ever永远，for example例如，for fear以免，for fair肯定地，for free免费，for fun为了好玩，for good永远，for instance比方，for luck祝福，for life终身，for long长久，for nothing白白地，for once有生第一次，for oneself替自己，for pleasure为了消遣，for reason因为…理由，for sale供出售，for shame真不害臊，for short简称，for sport好玩，for sure确切地。
4.动词+副词/名词+for构成的短语：be in for将遇到，make up for弥补，go in for从事，l o ok out for提防，take sth. for granted把…当作理所当然, have an ear for音感好, have a gift for有某方面的天赋。
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