史上最全的构词法用法详解语言中词的总和构成词汇，但是词汇并不是一堆杂乱无章、互不相关的群体，而是一个严密体系，在这个结构的体系中，词与词之间有着各种各样的联系。
英语中的这些联系的规律总结起来就是构词。
英语中构词的方法就是构词法。
构词法主要有合成法、转化法、派生法和缩略法四种。
掌握构词法是迅速扩大词汇量的重要方法之一。
第一节合成法合成法就是指由两个或两个以上的单词合成的词叫合成词。
这种构词方式主要有两种：复合法、结合法。
合成法主要是构成合成名词和合成形容词。
复合法构成的复合词，它们各个结合的部分相互间的语法关系是紧密相关的。
如blackboard和darkroom都是形容词和名词形成的结构，wr it ing desk是动词名词和名词形式的结构。
结合法形成的词是形态合成词，它的结合是用一个起来连接作用的中缀来把两个或两上以上的词根词素紧紧的连缀在一起。
如，用辅音字母－s－来缀全两个词根词素构成的词有：salesman, towns people等。
合成的方式常见的有如下几种：一、合成名词1、名词／代词＋名词：woman-doctor, women-doctors, workshop, spaceship, he-goat, coal fire, motorcycle, gas cooker, oil well, power plant, silk worm, gold mine, bottleneck, piano keys, teleph one receiver, television screen, chairman, fireman, motorman, police-officer, postman, pine tree, girl friend, boy friend, goldfish, raindrop, birdcage, breakfast time, flowerbed, tearoom,2、动词＋名词：blowpipe, flashlight, watchdog, call-girl, searchlight3、形容词＋名词：blacksmith, blackboard, supermarket, superman, darkroom, blackbird, highchair, hothouse, greenhouse, madman4、动名词＋名词：reading-room, sitting-room, classroom, schoolroom, dining room, building materials, dancing girl, cleaning women, flying machine, washing machine, working conditions, boilding point, drinking water, swimming pool, drinking cup, typing paper, writing desk, sewing machine, walking stick,5、名词＋动名词：machine-building, shoe-making, paper-correcting, book-keeping, dressmaking, letter-writing, story-telling, town-planning, handwriting, sun-bathing, horse riding, churchgoing, daydreaming6、动词＋副词：stand-by, take-off, cut-off, breakdown7、副词＋名词：downfall, rainfall, outhouse8、现在分词＋名词：running dog, running water, flying fish, rising sun, burning stick,9、名词＋介词＋名词：man-of-war, editor-in-chief,10、名词＋连词字母＋名词：handiwork, nowadays11、介词／副词＋名词：afternoon, inland, overbalance二、合成形容词1、形容词＋名词＋ed：five-storeyed, one-eyed, double-faced, blue-eyed,2、名词＋名词＋ed：honey-mouthed,3、名词／代词＋分词：man-made, heart-broken, self-educated, snow-covered, man-eating, peace-loving, paper-making, ocean-going, heartfelt, handmade, home-made, sunburnt, weather-beaten4、名词／代词＋形容词：color-blind, ice-cool, seasick, airsick, tax-free, grass-green, snow-white, rock-hard, sea-green5、形容词／数词＋名词：full-time, high-grade, second-hand,6、形容词／数词＋分词：ready-made, sleepy-looking, good-looking,7、副词＋分词：far-reaching, so-called, hard-working, far-reaching, well-meaning, newly-laid, well-meant, wide-spread8、副词＋形容词：ever-green, under-ripe,9、形容词＋形容词：dark-blue, red-hot, grey-green10、介词＋名词：downhill, overnight三、合成副词1、形容词＋名词：sometimes, meanwhile2、副词＋名词：oftentimes, indoors, outdoors, overhead3、介词＋名词：alongside, beforehand4、名词＋形容词：skyhigh, stonestill,5、副词＋介词：nearby, upalong,四、合成动词1、名词＋动词：overhear, underline2、形容词＋动词：moonwalk3、副词＋动词：white-wash, safeguard五、其它合成词1、合成代词：everybody, everyone, everything, anyone, anybody, anything2、合成介词：outside, inside, throughout第二节转化法不用借助构词词缀，把一个单词从一种词类转化成另一种词类的方法就是转化法。
由于词类转化的结果，英语中就形成了大量外形相同但词类不同的词，即同形异类词。
转化主要有如下几种类型。
一、名词起定语作用（类似名词转化为形容词）：space travel, television network, stone table, paper bag, water pipe, history teacher, college students二、名词转化为动词：boat go boating, dust to dust the desk, film to film this story, mail to mail, ship to ship the goods, train to train三、形容词转化为动词：slow to slow down a little bit, dry to dry your hands, wrong to wrong sb, free to free the slaves, narrow to narrow the street,四、动词转化为名词：to act an act, to dress a good dress, to doubt without any doubt, to guide us a local guide, to smell a terrible smell, to love love of one’s country, to taste a good taste, to demand a demand for more equal rights五、形容词转化为名词：chemical dangerous chemicals, daily China Daily, final a maths final, native a native第三节派生法派生法又叫词缀法，即在一个单词前或其后加上词缀，构成新的单词。
中学英语中以派生法生成的词汇占整个中学词汇总量的25％。
一、前缀一般说来前缀不会改变一个词的词性。
1、否定前缀(1) un-a. un +形容词：unfit, unhappy, unfair, unlucky, unfortunate, unkind, unimportant, unnecessary, uncomfortable, unselfish, unusual, uncommon, unexpected, unknown, unthinkable, unbelievable, unseen, unforgettable, unwise, unhealthy, unpleasant, unable, untrueb. un+副词：undoubtedly, unexpectedly, unfortunately, unusually, unhappily, unluckily由un＋形容词构成的词除了unknown, unseen, unfit等词之外，其它词都可变为加-ly的副词（个别形容词尾需要变动）。
c. un＋动词：uncover, untie, unlock, undress, undo, unpack(2) im＋形容词：impossible, impolite(3) in＋形容词：incorrect, incomplete, invisible, independent(4) ir＋形容词：irregular(5) mis＋动词：misspell, misunderstand, mistake(6) dis-a. dis＋名词：dishonour, disease, discomfortb. dis＋形容词：dishonest, discouragedc. dis＋动词：disappear, dislike, discover, disclose, disagree, discomfort, dismiss2、表示空间、位置关系的前缀(1) a－，大多加在音节较少的名词或不及物动词上构成新词，表示“在……之上、向……、处于……状态”：ahead, abroad, aside, alive, awake, above, about等。