全国大众英语测验语法——谓语需用双数
1）代词each和由every, some, no, any等组成的复合代词作主语，或主语中含有each, every,谓语需用双数。
Each of us has a tape-recorder.
There is something wrong with my watch.
2）当主语是一本书或一条格言时，谓语动词常用双数。
The Arabian Night is a book known to lovers of English.
""天方夜谭""是英语快乐喜爱者认识的一本好书。
3）默示款项，时候，价钱或度量衡的复合名词作主语时，每每把这些名词看作一个团体，谓语通俗用双数。(用双数也可，意思稳定。)
Three weeks was allowed for IT the necessary preparations.
Ten yuan is enough.

关键字：非谓语动词语法 语法 谓语 非谓语动词语法解说 非谓语动词 第三人称双数