数字 1~12
one, two, three, four, five, six,
seven, eight, nine, ten, eleven, twelve
（eleven 是 11，twelve 是 12，别记反啦！）
问"几个"：How many + 复数？
How many birds can you see? — I can see ten.（你能看见几只鸟？）
问几个，东西后面要加 s：How many apples?
问"几点"：What time is it?
It's seven o'clock.（7 点整）——整点后面加 o'clock
It's half past seven.（7 点半）——half past 是"过了半小时"（三年级下学期学）
It's time to get up!（该起床啦！）
口诀
整点 o'clock，半点 half past；
It's time to…，该做什么跟在后。