名词复数构成的方法
有规则的有：
(1)直接在名词后加s
如orange—oranges; photo—photos;
(2) 以x, s, sh, ch 结尾的加es
如：box—boxes; glass—glasses; waitress—waitresses; watch—watches;peach--peaches
(3) 以辅音字母加y结尾的改y为i加es
如：study—studies；library—libraries; hobby—hobbies; family—families;
(4)以f, fe结尾的改f, fe 为v＋es如：knife—knives; thief—thieves（注:以o结尾的我们学过的只有mango加es, mango—mangoes其余加s,）
不规则的有：
man—men; woman—women; people—people; child—childre
动词第三人称单数的构成
(1)直接在动词后加s
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;
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;
附：
原形→过去式→过去式+(e)n
原形过去式过去分词汉语意思
wearworeworn穿
forgetforgotforgotten忘记
speakspokespoken说
freezefrozefrozen冻
choosechosechosen选择
drivedrovedriven驾驶
mistakemistookmistaken误解
riseroserisen上升
shakeshookshaken摇
原形→过去式→原形+(e)n
原形过去式过去分词汉语意思
eatateeaten吃
forbidforbadeforbidden禁止
givegavegiven给
rideroderidden骑
seesawseen看见
writewrotewritten写
fallfellfallen落下
breakbrokebroken打破，折断
forgiveforgaveforgiven原谅；宽恕
无规律
