1
back someone/something
表示支持或赞同，常指提供财务或道义上的支持。
Many people backed the proposal.
许多人支持这个提议。
支持；资助
先理解核心含义，再看它在真实句子里的用法。
支持；资助
To support or endorse someone or something.
Many people backed the proposal.
许多人支持这个提议。
朝相反方向行进。
To go in the reverse direction.
支持。
To support.
改变方向,与正常模式相反；即北半球逆时针,南半球顺时针。
To change direction contrary to the normal pattern; that is, to shift anticlockwise in the northern hemisphere, or clockwise in the southern hemisphere.
转动帆桁使风压向帆面,以降低船速。
To brace the yards so that the wind presses on the front of the sail, to slow the ship.
back
Base
原形
backs
3rd person
第三人称单数
backing
-ing
现在分词
backed
Past
过去式
backed
Past participle
过去分词
I back his proposal.
我支持他的提议。
She backed the car into the garage.
她把车倒进了车库。
They are backing the new policy.
他们正在支持新政策。
支持；后退
He backed his friend's proposal during the meeting.
他在会议上支持了朋友的提议。
Several investors backed the startup with a large sum of money.
几位投资者用一大笔钱资助了这家初创公司。
I will back your plan if you can provide more details.
如果你能提供更多细节，我会支持你的计划。
表示支持或赞同，常指提供财务或道义上的支持。
Many people backed the proposal.
许多人支持这个提议。
意为退出或食言，常用于承诺或协议。
He backed out of the deal at the last minute.
他在最后一刻退出了交易。
指将车辆等倒行进入某处。
She backed the car into the garage.
她把车倒进车库。
Not this
I backed home after work.
Use this
I went back home after work.
"back"作动词表示"向后移动"，不表示"返回某地"；表示"返回"应使用"go back"或"return"。
Not this
I will back your phone call.
Use this
I will return your phone call.
"back"作动词没有"回电话"的意思；表达"回电话"应使用"return"或"call back"。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
支持一项计划
The committee decided to back the plan.
委员会决定支持这项计划。
支持一位候选人
Many people backed the candidate in the election.
许多人在选举中支持那位候选人。
支持一个项目
The company backed the project with significant funding.
公司用大量资金支持这个项目。
退缩，让步
He refused to back down despite the criticism.
尽管受到批评，他拒绝让步。
支持，证实
Can you back up your claim with evidence?
你能用证据支持你的说法吗？
后退，退缩
She backed away from the angry dog.
她从愤怒的狗身边后退。
放弃，退缩
He refused to back down from his demands.
他拒绝放弃自己的要求。
退出，食言
She backed out of the deal at the last minute.
她在最后一刻退出了交易。
后退，让步
The company decided to back off from the aggressive marketing campaign.
公司决定放弃激进的营销活动。
退后，老兄，我是科学家。
You should back off when you see a warning sign.
看到警告标志时你应该后退。
后退，后退，把那东西往后退。
He backed the car into the garage.
他把车倒进了车库。
Use back (adv.) naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想“back”作为动词：背后支持是back，倒车后退也是back，就像有人在你背后撑腰或你向后倒车。
典型语境：日常对话、体育评论、商业谈判、政治支持。语体：混合，通常用于非正式场合，但在正式场合也可使用，比较常见于口语中。
作为动词时，既可作及物动词也可作不及物动词。及物用法如 back a candidate (支持候选人)，不及物用法如 back away (后退)。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.