考点五：基数词与序数词辨异
●表示人或物的数量”，要用基数词。如：five students五个学生”，one hundred computers一百台电脑”。
●表示第几”要用序数词，前面要与the或人称代词所有格连用。例如：the First World War第一次世界大战”，the third flood第三层楼”，in her second class在她的第二节课上”。
●a/an+序数词”不是强调第几”，而是表示又一、另一、再一”。例如：a second Lei Feng又一个活雷锋”，a third time再次”。
中考链接
1. My grandparents live in an old apartment with ______ floors and they are on the ______ floor.
A. fifth; three B. fifth; third
C. five; three D. five; third
2. A year is divided into ______ months. August is the ______ month of the year.
A. twelve; eight
B. twelve; eighth
C. twelfth; eight
D. twelfth; eighth
【答案】
1.D 2. B
