重点讲解:
1. used to do sth. 过去常常;过去曾;
例句:He used to muck out the stables every morning.
他过去每天早上打扫马厩 。
2. or so …左右;…上下;
例句:We can seat you in five minutes or so.
五分钟左右我们就可以为您安排好座位 。
3. back and forth 来回;往返;
例句:He promenaded back and forth on the ship's deck.
他在船的甲板上来回散步 。
4. get along with (与…)和睦相处;
例句:I find it difficult to get along with your brother.
我觉得难以同你的兄弟相处 。
n. 开关,转换,鞭子
v. 转换,改变,交换