1704948943
acoustics aerobics aerodynamics aeronautics athletics classics economics electronics ethics genetics gymnastics linguistics logistics mathematics mechanics obstetrics physics politics statistics thermodynamics 有些疾病名称也以-s结尾：
1704948944
1704948945
diabetes measles mumps rabies rickets shingles 以这类词作主语时，动词要用单数形式：
1704948946
1704948947
Mathematics is a subject studied in nearly every school．数学是几乎每个学校都学的科目。
1704948948
1704948949
Measles is in most cases a harmless illness．麻疹在多数情况下都是无害的病。
1704948950
1704948951
Politics is much more difficult than physics．政治学比物理学难。
1704948952
1704948953
但在一定情况也可跟复数动词：
1704948954
1704948955
Politics have never interested me．政治活动我从来不感兴趣。
1704948956
1704948957
His mathematics are weak．他的数学能力不强。
1704948958
1704948959
The acoustics of the new concert hall are excellent．新音乐厅的音响效果好极了。
1704948960
1704948961
有些名词表示由两部分构成的东西，都作复数形式，如：
1704948962
1704948963
glasses jeans knickers pants pyjamas shorts tights trousers binoculars pincers pliers scales scissors shears tweezers 这种名词常可以a pair of（一副，一条）修饰：
1704948964
1704948965
Have you got a pair of scissors？你有一把剪刀吗？
1704948966
1704948967
He bought two pairs of shorts．他买了两条短裤。
1704948968
1704948969
a faded pair of blue jeans 一条褪色的工装裤
1704948970
1704948971
也可不用修饰语：
1704948972
1704948973
I have to get new glasses．我得买（一副）新眼镜。
1704948974
1704948975
He watched the horse-race through (a pair of) binoculars．他用望远镜看赛马。
1704948976
1704948977
He was wearing striped pyjamas．他穿一套带条纹的睡衣睡裤。
1704948978
1704948979
个体名词及集体名词：
1704948980
1704948981
可数名词中多数是个体名词，也有一些是集体名词。最常见的集体名词有：
1704948982
1704948983
army audience committee company crew enemy family flock gang government group herd navy press public staff team 在用这类名词作主语时，后面动词有时作复数形式：
1704948984
1704948985
A group of children were playing in the park．一群孩子在公园里玩耍。
1704948986
1704948987
A flock of wild geese were flying over head．一群雁正从头上飞过。
1704948988
1704948989
The crew are paid to do all the work on the ship．船员被雇来干船上的各种工作。
1704948990
1704948991
有时作单数形式：
1704948992
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