单位词是又叫“单位名词”，它是能够表示事物个体性的词语。英语的不可数名词一般没有单、复数形式，不可以个数计算，要面对这类名词计数就得用到单位词了。肯定有很多同学想知道，英语单位词到底有哪些？它们该如何记？
汉语和英语中，关于单位词的概念有很大差异。
比如，汉语中一群人、一群蚂蚁、一群鱼等，都只需要在名词前面加上“一群”，就可以准确地表达出来，而英语中这样的“一群”的概念，是用不同的方式表达的。下面看几个例子：
汉语 英语
一群人 a group of people
一群蚂蚁 a swarm of ants
一群鱼 a school of fish
一群鸡 a flock of chickens
一群大象 a herd of elephants
一群狼 a pack of wolves
从上述例子可以看出，汉语中的“一群”，在英语中就有很多种表示方法。而汉语中很多“把”、“张”、“双”等的概念，英语中也仅仅用“a'或”a pair of“就可以表达。例如：
汉语 英语
一本书 a book
一台相机 a camera
一辆汽车 a car
一双鞋 a pair of shoes
一副眼镜 a pair of glasses
一把剪刀 a pair of scissors
可以看出，汉语和英语在数量中的单位词用法上差别是很大的。下面是小编整理出来的一些相关信息，希望对大家有所帮助。
英语单位词一般借用普通名词，因此一般都有词汇意义。它们大体可以分为以下几类。
a）一般表示个体的单位词
这类单位词包括piece, bit, item, article,它们的搭配能力很强，特别是piece, bit, 一般不可数名词通常都和它们搭配。例如a piece of advice/armour/bacon/bread/cake/chalk/cloth/
coal/evidence/folly/furniture/ice/information/land/meat/music/news/paper/research/sugar/work/;a bit of advice/
bread/grass/news/trouble/wood等。
b)表示形状的单位词
这类单位词，如：cake. bar, drop, ear, flight, grain, head, loaf. lump， spiral, slice等， 都与物类的形状有关，因此搭配能力颇受限利。例如:
a cake of soap ten head of cattle/cabbage
a bar of chocolate a bundle of firewood
a drop of water a loaf of bread
a flight of stairs a spiral of incense
a grain of sand a slice of meat
c)表示容积的单位词
这类单位词，如：bottle, bowl, pail, bucket, glass, cup, handful, spoonful, truckload,lorryload等，都是一些表示容积的普通名词，搭配能力较强。例如:
a bottle of ink a cup of tea
a bowl of rice a handful of clay
two spoonfuls of hot water a bucket of milk a truckload of steel
a glass of beer four lorryloads of sand
d)表示动作状态的单位词
这类单位词，如fit, peal, flash, display 等，通常只限于某些固定搭配。如:a fit of anger/coughing/laughter/fever
a peal of applause/laughter/thunder
a flash of hope/light/lightning
a display of courage/force/power/skill/fireworks
e)表示成双、成组、成群的单位词
这类单位词包括pair, group, flock, herd, litter, swarm, bench, troupe, pack, shoal, school等，通常也只限于某些固定搭配。
例如:
a pair of shoes a school of whales
a flock of birds a group of people
a herd of elephants a bench of judges
a litter of kittens a troupe of actors
a swarm of bees a gang of hooligans
a shoal of fish a pack of hounds
下面做一些改错练习吧。
1. Poultries are dear in the city.
2.The board of director is shaking heads at the chairman's speech.
2. The militias were called out to guard the borderland.
3. Such brilliant authors are really genii of our times.
4. The merchandises have arrived undamaged.
5. On hearing the death of my professor, I sent my sympathy.
6. He is relating to the children his experience as explorer.
7. The Middle Ages was a time of feudal rivalries.
8. The clipping of the hedges was usually burnt.
9. There were some looker-ons by the roadside, but
they didn't inform the police of the accident.
10.In the garden she took a lot of photography.
11.Luggages are not allowed to be left here.
怎么样？以上做的还可以吗？相信不少同学已经掌握了基本要领，多加练习，终会有所获的。
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