如：run—runs; dance—dances

(2)以s,sh,ch,o结尾的加es

如：do—does;go—goes;wash—washes;catch—catches

(3)以辅音字母加y结尾的改y为i加es

如：study—studies; carry—carries;

17. 现在分词的构成

(1)直接在动词后加ing

如：sing—singing; ski—skiing;

(2)双写词尾加ing

如：swim—swimming; jog—jogging;run—running;

(3)以不发音的e结尾的去e加ing

如：ride—riding; dance—dancing; make—making;

18. 规则动词过去式的构成

(1)直接在动词后加ed

如：clean—cleaned; milk—milked; play—played;

(2)以e结尾的直接加d

如：dance—danced; taste—tasted;

(3) 以辅音字母加y结尾的改y为i加ed

如：study—studied;carry—carried;

(4)双写词尾加ed

如：stop—stopped; jog—jogged;

不规则的有：am,is—was; are—were; do,does—did; have,has—had; go—went; meet—met; sit—sat; see—saw; get—got; tell—told; run—ran; come—came; steal—stole; read—read;

19.形容词副词比较级的构成

规则的：

(1)直接在形容词或副词后加er

如;small—smaller; low—lower;

(2)以e结尾的加r

如：late—larer;

(3)双写词尾加er

如：big—bigger; thin—thinner; fat—fatter;

(4) 以辅音字母加y结尾的改y为i加er

如：heavy—heavier; early—earlier;

不规则的有：

good, well—better(最高级为best); many, much--- more(最高级为most); far---farther;

20.rain与snow的用法

(1)作为名词意思是雨水和雪是不可数名词

如：There is a lot of rain there in spring. 那儿的春天有很多雨水。

(2) 作为动词意思是下雨和下雪，有四种形式分别是：

动词原形rain， snow;

第三人称单数rains ，snows;