学习必备 。1. 写数字 1-12__________________________________________________________________________________________________________________________________________2. 写数字 13-19_____________________________________________________________________3. 写整十。20__________________ 30___________________ 40___________________50___________________ 60___________________ 70___________________80___________________ 90___________________ 100___________________4. 写出下列数字。21___________________ 32___________________ 43___________________54___________________ 65___________________ 76___________________87___________________ 98___________________ 101__________________210___________________________ 。序数词用于表示事物的顺序,一般由与之相应的基数词加 th 构成(但有特殊形式需特别记忆 );序数词主要用作定语,前面一般要加定冠词 (或物主代词 )。如:Their second son is a doctor. 他们的二儿子是个博士。I like the first movie. 我喜欢第一部电影。1. 基数词变序数词。其规律为:1). 一,二,三,特别记,词尾字母 t d d,然后再加 th, (1st ___________, 2nd___________, 3rd ___________ 4th _____________)2). 八去 t,九去 e,f 要把 ve 替,然后再加 th, (8th ____________, 9th______________)3 )整十变化需注意,把 y 要变成 ie ,然后再加 th(5th ___________, 12th____________,20th_____________, 30th ________________90th__________________)4). 若是遇到几十几,只变个位就可以(21st___________________ 32nd______________________43rd______________________ 54th ______________________)2. 写出下列序数词。1st___________________ 2nd___________________ 3rd_________________
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