15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—children

　　16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;

　　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;