通用高中英语语法知识点 数词

数   词 考点 1   具体数词 + hundred /thousand /million /billion ... 考点 2   泛指不确定的数量时，用“dozens of 、hundreds of 、 thousands of ...” 考点 3   常见用法①    a three-day holiday 、 an 8-year-old girl②    two meters long = two meters in length③    another three days passed = three more days passed = three other days passed④    unit six = the sixth unit 、 Lesson Four = the fourth lesson 、Class Two，Grade Five⑤    in the 1980’s = in the 1980s⑥    the 21stcentury⑦    July 1（st），2020 考点 4  表示年龄 ① 7 years old = 7 years of age = at the age of 7② in one’s + 整十的基数词的复数。如：in his sixties. 考点 5   表示分数①    分子为1 ： one fifth②    分子大于1 ： two fifths③    1/2 : one half (a half)     1/4 : a quarter = one fourth                               3/4 : three fourths = three quarters④ 分数 + of + 名词 时，谓语动词的形式与分数后的名词单复数一致   One third of the students are girls.   One third of the milk is mine . 考点 6   表示钟点①    整点： 5 o’clock②    分钟小于30 min 用past ： fifteen（a quarter） past eight③    分钟大于30 min 用 to ：twenty to eight 考点 7   表示倍数(1)         倍数+ as+ adj./adv.原级 + as。   如： My room is four times as big as yours.(2） 倍数+ adj./adv.比较级 + than。   如:  The river is five times longer than that one.(3） 倍数+ the size／length／weight…+ of + 表示比较级对象的名词。如： This bridge is three times the length of that one.