（一），时间用基数词表示，上午用am/a.m ,下午用pm/p.m 表示如
6:25am 表示上午六点二十五分
7:30pm 表示下午七点半
时间正确读法
past:几点过几分（在30分钟之内）
7:10读作ten past seven
to ：几点差几分（相差在30分之内）
7:50读作ten to eight
o'clock:整点整分
7:00读作seven o'clock
half；一半
7:30读作half past seven
a quarter；一刻钟
13:45读作a quarter to fourteen
直接按照数字顺序读
6::15读作six fifteen.
6:50读作six fifty
对时间提问时，疑问句用what time
what time is it now7？it's twenty fifteen
二，倍数表达
用times 表示倍数一般包括基数词在三倍或以上的倍数，两倍通常用“twice”或“double.”,一倍用“once”通常表达如下
1）倍数＋as 形容词/副词原级 as
the new building is four times as big as old one
2）倍数 形容词/副词比较级＋than
the new building is three times larger than old one
3)倍数＋名词＋of（size, height, width）
the street is four times the lengthy of that one
the new building is three times the height of the old one.
4）倍数 as many/ much 名词＋as表示A是B的……倍多。
my little brother drinks twice as much water today as he did yesterday
5）倍数＋more 名词＋than A是B的……多
there are twice more students in our class than in yours
