
数字 基数词 序数词
1 one first 2 two cond 3 three third
4 four fourth 5 five fifth 6 six sixth
7 ven venth 8 eight eighth 9 nine ninth
10 ten tenth 11 eleven eleventh 12 twelve twelfth
13 threeteen threeteenth 14 fourteen fourteenth
15 fifteen fifteenth 16 sixteen sixteenth
17 venteen venteenth 18 eighteen eighteenth
19 nineteen nineteenth 20 twenty twentieth
21 twenty-one twenty-first 22 twenty-two twenty-cond
30 thirty thirtieth 40 forty fourtieth
50 fifty fiftieth 60 sixty sixtieth
70 venty ventieth
动词变ing规则:
1.英语动词加-ing,通常是在原形词尾直接加-ing构成:
cough—coughing,climb—climbing,stand—standing,fight
—fighting
2.以-e结尾的动词 (1)如果动词原形以一辅音加一不
发音的-e结尾,一般应去掉e再加ing: write—writing,hope
—hoping,care—caring,stare—staring,plane—plan-ing,
have—having,save—saving, produce—producing,
breathe—breathing
(2)以-ie结尾的动词应先将e去掉,将i变成y然后再加-ing:
die—dying,tie—tying,vie—vying,lie—lying
3.以一元音加一辅音结尾的动词,最后一个字母需要重复:
如run—running, stop—stopping, hop—hopping, plan—
planning, swim—swimming
名词变复数规则:
1.一般名词复数是在名词后面加上“s”,如map→maps, bag
→bags等;
2.以s, sh, ch, x,o等结尾的词加“es”,如bus→bus,
watch→watches等;
3.以辅音字母+y结尾的词,变y为i加es,如baby→babies
等;以元音字母+ y结尾的名词变复数时,直接加s变复数,
如monkey→monkeys, holiday→holidays,
4.以o 结尾的名词变复数时:
a)加s的名词有:photo→photos ,piano→pianos, radio
→radios, zoo→zoos

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