一、名词形状
形单义复
1.family 类名词作主语
强调整体时，谓语动词用单数;
强调个体时，谓语动词用复数。
如：My family is a happy family.
My family are so busy getting ready for Spring Festival.
类似的词还有：class，group，band，crew, committee，audience，public，club，staff, cabinet(内阁)，team 等等
练习1. The flight service crew __________ largely women.
A. is B. was C. are D. were
2.police 类名词作主语 总是用复数、
如：The police are looking for the lost child.
Cattle feed on grass.
这类名词还有：people，youth，personnel，cattle，vermin寄生虫、，poultry, clergy(牧师)，militia(民兵) 等等
形复义单
1.学科：physics，mathematics，electronics，economics，news，statistics
如：Electronics is a piece of cake to him.
2.疾病：mumps 腮腺炎、，measles 麻疹、，diabetes(糖尿病)，arthritis(关节炎)
3.书名、报刊名、国家名
如：《Great Expectations》 远大前程
《Times Weekly》 时代周刊
the United States
4.运动项目：
如：parallel bars 双杠