Unit 4 How do you get to school?
重点语法：询问别人做某事的方式
用How 引导特殊疑问句
其回答有多种方式，其中一种结构是by doing sth. 或by sth. 的结构。
询问两地的距离用how far 引导特殊疑问句
回答用be + (distance) + [away] + from 的结构。
例句：A: How do you get to school?(你如何去上学？)
B: I take the subway.(我乘地铁去上学。)
A: How far is it from your home to school?(从家到学校多远？)
B: It's three miles.(有三英里远。)
A: How long does it take you to get from home to school?(从家到学校需要花多长时间？)
B: It takes 25 minutes.(要花25 分钟。)
重点短语：by bus = take the bus 乘公共汽车
how far 多远
depend on 依赖于
by boat = take the boat 乘船
look at 看
by train = take the train 乘火车
by bike = ride one's bike 骑车
by subway =take the subway 乘地铁
by plane = take the plane 乘飞机
on foot 走路
get up 起床
have breakfast 吃早饭
leave for somewhere 离开去某地
take sb. to somewhere 带某人去某地
half an hour = thirty minutes 半小时（三十分钟）
around the world = all over the world 全世界
get to school 到学校
think of 认为
on weekend 在周末