名词的复数规则(1)．一般情况下，直接加-s，如：book-books,bag-bags,cat-cats,bed-beds

(2)．以s.x.sh.ch结尾，加-es，如：bus-buses,box-boxes,brush-brushes,watch-watches

(3)．以"辅音字母+y"结尾，变y为i,再加-es，如：family-families,strawberry-strawberries

(4)．以"f或fe"结尾，变f或fe为v,再加-es，如：knife-knives

(5)不规则名词复数：man---men,woman---women,policeman---policemen,policewoman---policewomen,mouse---micechild---childrenfoot---feet,.tooth---teethfish---fish,people---people,Chinese---Chinese,Japanese---Japanese

1.主格一般用在句中作为主语，一般用在动词前（除疑问句）

2.宾格多用于动词介词后面。


3.形容词遥物主代词后面必须要跟名词。


4.名次遥物主代词＝形容词遥物主代词+名词