名词.n,book,pen,map,boy,

　　形容词good,fine,great,beautiful

　　动词sit,come,do,have,cry,laugh,

　　代词this,that,they,we,us,he,she,it,these,

　　副词well,quickly,wonderfully,carefully

　　介词in.on,under,

　　连词and,or,but,

　　冠词a,an,the,

　　叹词oh,Hellow,hi,well,

　　数词one,two,first,hundred,thousand