-s meaning in English

短语和例子
[ (浊辅[子]音后) z, (清辅[子]音后) s; z, s]后缀
1.名词复数在词末加 -s: cats, dogs.
2.行为动词第三人称单数现在一般时在词末加 -s: He jumps. It rains.
3.副词词尾：always, indoors, needs, forwards.