(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；

现在分词raining；snowing

过去式rained；snowed;

如：①Look!It is raining now.瞧！天正在下雨。