back的过去式和用法例句有哪些
back做动词有支持;后退等意思，那么你知道back的过去式是什么吗?下面是学习啦小编为大家整理的back的过去时态以及一些用法例句，欢迎大家学习!
back的过去式和其他时态
过去式: backed
过去分词: backed
现在分词: backing
back的用法
back的用法1：back的基本意思是“(使)后退”,指某人或某物回到原来的位置或状态。有时引申可表示“支持”,即“作后盾”。
back的用法2：back可用作及物动词或不及物动词,用作及物动词时接名词或代词作简单宾语。
back的用法3：back用作副词的基本意思是“往后,在后面”,也可引申表示“忍住”“恢复”或“上溯”。
back的用法4：back常修饰动态动词(如不及物动词go, come, get,及物动词bring, get, take等),在句中作状语,也可用作表语。
back的用法5：back和be连用可引申表示“恢复”; back和beat, hit, fight等动词连用可表示“打退”。
back的用法6：back作“来回;向后”解时一般不与turn连用。
back的过去式例句
1. I heard the engines revving as the lorries backed and turned.
卡车倒车和掉头的时候，我听见发动机的轰鸣声。
2. The train backed out of Adelaide Yard on to the Dublin-Belfast line.
火车倒出了阿德莱德调车场，开上了都柏林-贝尔法斯特线。
3. Traffic into London on the M11 was backed up for several miles.
进入伦敦的车辆在11号高速公路上堵了好几英里。
4. He appears to have backed himself into a tight corner.
他似乎已把自己逼入了困境。
5. He backed up a few feet and rolled the window down.
他往后倒了几英尺，然后摇下车窗。
6. Roland Nilsson last night backed Sheffield Wednesday to win the UEFA Cup.
昨晚罗兰·尼尔森打赌谢菲尔德周三队会捧得欧洲联盟杯。
7. These front-line defences are backed up by armoured units in reserve.
前线的防务得到后备装甲部队的支援。
8. I backed up carefully until I felt the wall against my back.
我小心翼翼地后退，直到感觉后背碰到了墙壁。
9. She was backed by acoustic guitar, bass and congas.
原声吉他、贝斯和康茄鼓为她伴奏。
10. Madonna backed out of the project after much wrangling.
多番争吵之后，麦当娜退出了这个项目。
11. The Prime Minister is backed by the civic movement, Public Against Violence.
首相得到“全民反暴力”公民运动的支持。
12. Until yesterday, Britain had backed away because it didn't like the cost.
直到昨天，英国还因为成本太高而却步。
13. The company backed away from plans to cut their pay by 15%.
公司放弃了给他们降薪15%的计划。
14. When the Russian parliament overturned his decision, he backed down.
俄罗斯议会推翻了他的决定，他只好作罢。
15. It is upsetting to discover that you have backed a loser.
发现自己的投注对象输了是一件让人心烦的事。
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