序數(shù)詞的用法總結(jié)

1、序數(shù)詞的用法總結(jié) 以下是為大家的序數(shù)詞的用法總結(jié)，希望能幫助大家更好地認(rèn)識(shí)序數(shù)詞，提高水平。 1. 序數(shù)詞前要加定冠詞the, 通常放在名詞前面作定語(yǔ)。例如: the second lesson is more difficult than the first. 第2課比第1課要難。 2. 給東西或各種物體編號(hào)時(shí),序號(hào)在前時(shí)用序數(shù)詞,序號(hào)在后時(shí)用基數(shù)詞。例如: the fifth lesson, lesson five, no. 14 middle school 3. 序數(shù)詞前面加不定冠詞a/an, 表示“再一”、“又一”的意思。例如: try it a second time. 請(qǐng)?jiān)僭囈淮巍?/p>

2、 he cast it a third time, and drew in a lot of stones. 他又撒了第三次網(wǎng),拉上來(lái)許多石頭。 1. one 2. two 3. three 4. four 5. five 6. eight 7. nine 8. ten 9. twelve 10. twenty 11. thirty-one 12. sixty-five key: 1. first2. second3. third4. fourth5. fifth6. eighth7. ninth 8. tenth9. twelfth10. twentieth11. thirty-first1

3、2. sixty-fifth 1. 一般在相應(yīng)的基數(shù)詞后面加詞尾-th。 例如: fourfourth, sixsixth, sevenseventh, tententh, eleveneleventh, thirteenthirteenth 注意下面的一些特殊變化: onefirst, twosecond, threethird, fivefifth, twelvetwelfth,eighteighth, nineninth 2. 表示“幾十幾”或“幾百零幾”的基數(shù)詞變?yōu)樾驍?shù)詞時(shí),只將個(gè)位數(shù)變?yōu)樾驍?shù)詞,十位數(shù)或百位數(shù)不變。例如: twenty-onetwenty-first, thirty-

4、threethirty-third, forty-fourforty-fourth 3. 以-ty結(jié)尾的基數(shù)詞變?yōu)樾驍?shù)詞時(shí),應(yīng)先將y改為i, 再加-eth。 例如: twentytwentieth, thirtythirtieth, fortyfortieth, fiftyfiftieth, sixtysixtieth, seventyseventieth, eightyeightieth, niyniieth 4. 序數(shù)詞的縮略式一般由阿拉伯?dāng)?shù)字加上序數(shù)詞的最后兩個(gè)字母構(gòu)成。例如: first1st, second2nd, third3rd, fourth4th, twelfth12th, twenty-first21st 基變序,有規(guī)律, first, second, third要牢記; 其余變化有規(guī)律,基數(shù)詞尾加-th; eight去t、 nine去e后加-th。 從twenty, thirty到niy, 需先變y為ie, 再加-th