【序數詞】
1.概念:表示順序的詞稱為序數詞。
2.序數詞的寫法與讀法:
(1) 一般來說,是由相應的基數詞加詞尾th構成。例:
four + th → fourth six + th → sixth
seven + th → seventh ten + th → tenth
(2)下面這些基數詞在變為序數詞時,有特殊的變化。例:
one → first two → second three → third five → fifth
eight → eighth nine → ninth eleven→eleventh twelve → twelfth
(3)十位整數序數詞的構成方法是將基數詞的詞y變成i,然後再加eth。例:
twenty → twentieth thirty → thirtieth forty → fortieth ninety → ninetieth
(4)兩位或兩位以上的基數詞變成序數詞時,僅將個位數變成序數詞。例:
twenty-one → twenty-first 21 thirty-five → thirty-fifth 35
3.序數詞的用法:
(1)序數詞在使用時,一般加上定冠詞。例:
The first is larger than the second. (主語) 第一個比第二個大。
Read the book from the first.(賓語) 從開頭讀這本書。
You’ll be the sixth to write. (表語) 你將是第六個寫的。
但如果序數詞前已經有其他限定詞,則不加the。如:His first name is Mike.
作副詞時,不可再用the。 He often comes first in the exams.
You must finish your homework first.
(2)表示順序、次序。例:the first month of a year
(3)表示日期。例:on the eighth of March
(4)表示編號、樓層。例:the first unit on the sixth floor
(5)表示生日。例:It is his nineteenth birthday today. He is nineteen years old.
(6)表示名次。例:He often comes first in the exams.
(7)序數詞的前面可以加上不定冠詞,用來表示“再一”,“又一”的意思。例:
You may have a third try. 你可以第三次嘗試。
序數詞構成 請牢記口訣:
一二三,特殊記 ,加th從四起;八少t , 九少e ,逢五與十二,f 替ve ;
二十到九十,y變ie ; 若是幾十幾,前基後序要牢記
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