1. back to back : 背靠背；
2. turn one's back on : 背弃, 抛弃；
3. back down : 放弃要求, 取消前言；
4. back and forth : 来回地；
5. back up : 支持；
6. see the back of : 看(某人)离开, 赶走[摆脱](某人)；
7. be on one's back : 仰卧, 生病卧床；
8. back of : 在...后边；
9. with one's back to the wall : 困兽犹斗地；
副词
1. The house is set back from the road.
那所房屋远离公路。
及物动词
1. You could back the dress with silk.
你可以用丝绸布给这件衣服加衬里。
1. Someone was pacing back and forth behind the curtain.
有人在幕布后踱来踱去。
名词
1. We lay on our backs under the tree.
我们在树下躺着。
电影
A：(Hurry/ Quick/ Hurry up)! The movie is coming back on.
（快/快一些/快点）！电影开始了。
B：I’m coming.
来了。
培训
A：Where have you been?
你去了哪里？
B：I just got back from (camp/ school/ class).
我刚刚（从营地/从学校/上课）回来。
假期
B：When is this book due back?
这本书归还期限是什么时候？
A：It’s due back (next Tuesday/ a week from Friday/ in three days).
下星期二/星期五开始后的一个星期/三天以内。
1. 背：记法:后背(back)缺少了脊梁骨大头钉(tack)来代. wack n.怪人 W的形状像翅膀. 记法:后背(back)长翅膀(W)的人不是圣人就是怪人(wack). 故事串联:墨水当水喝,我想(think)是胡说,喝完墨水去滑冰(ice),一不注意(notice)落水中,
2. 后 方：以下是它的特性:5.第一步移动离身体远些同时加些压力入地板,保留一些重心在支撑脚,在第一步即将结束时脚尖稍转向外,这一步可移动向前(Forward)、斜前(Diagonal Forward)、旁边(Sideways)、斜后(Diagonally Back)和后方(Back).
副词用法（ADVERB USES）
In addition to the uses shown below, back is also used in phrasal verbs such as ‘date back’ and ‘fall back on’.noun
1. (American football) the position of a player on a football team who is stationed behind the line of scrimmage
2. a support that you can lean against while sitting
e.g. the back of the dental chair was adjustable
Synonym: backrest
3. the part of a garment that covers the back of your body
e.g. they pinned a `kick me' sign on his back
4. the protective covering on the front, back, and spine of a book
e.g. the book had a leather binding
Synonym: bindingbook bindingcover
5. the side that goes last or is not normally seen
e.g. he wrote the date on the back of the photograph
Synonym: rear
6. the posterior part of a human (or animal) body from the neck to the end of the spine
e.g. his back was nicely tanned
Synonym: dorsum
7. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
e.g. the fall broke his back
Synonym: spinal columnvertebral columnspinebackbonerachis
8. the part of something that is furthest from the normal viewer
e.g. he stood at the back of the stage
it was hidden in the rear of the store
Synonym: rear
9. (football) a person who plays in the backfield