give sb the go-ahead to do sth
常用于商务和口语语境，表示上级或负责人正式准许某人做某事。
The board gave us the go-ahead to start the project.
董事会批准我们启动这个项目。
批准、同意或指示开始或继续；进取心；放行信号
批准、同意或指示开始或继续
Approval, agreement, or instruction to begin or proceed.
The project received the go-ahead from the board of directors yesterday.
该项目昨天获得了董事会的放行许可。
用法提示：名词，意为‘放行信号’，用作动词receive的宾语。
She has a lot of go-ahead and is always starting new ventures.
她很有进取心，总是开办新企业。
用法提示：名词，意为‘进取心’，用作介词of的宾语。
Once we get the go-ahead, we can start construction immediately.
一旦得到批准，我们就能立即开始施工。
用法提示：名词，意为‘准许’，用作动词get的宾语。
常用于商务和口语语境，表示上级或负责人正式准许某人做某事。
The board gave us the go-ahead to start the project.
董事会批准我们启动这个项目。
get 也可换成 receive，后面常接 from 说明许可来自谁。
We won't start until we get the go-ahead from head office.
在得到总部的批准之前，我们不会开始。
后接名词或名词短语，说明获批的具体事项。
The council has given the go-ahead for the new housing development.
市议会已批准这项新住宅开发项目。
grammar · medium
易错句子We finally got the go ahead to start the project.
正确表达We finally got the go-ahead to start the project.
作名词表示“批准、许可”时，go-ahead 是带连字符的复合名词；不带连字符的 go ahead 是动词短语，意为“继续进行”，不能放在 the 后面作名词宾语。
grammar · medium
易错句子We are waiting for go-ahead from the head office.
正确表达We are waiting for the go-ahead from the head office.
该名词表示某一次具体的批准时通常与定冠词 the 连用，即 the go-ahead；汉语没有冠词，学习者容易漏掉 the，但英语中特指这次批准时必须加上。
grammar · medium
易错句子The board gave the go-ahead of the merger.
正确表达The board gave the go-ahead for the merger.
go-ahead 作名词时用介词 for 引出被批准的事项，不用 of；用 of 是把汉语“某事的批准”逐字直译造成的误用。
approval 更正式，多指机构或上级对申请、方案的批准，常与 get/win approval 搭配；go-ahead 更口语，指准许开始或继续的信号，常说 the go-ahead for/to do。正式文件多用 approval。
green light 是口语化的比喻，强调像信号灯一样放行，常与 give/get the green light 搭配；go-ahead 更直接指“批准开始”，常与 the 连用。非正式商务语境中两者常可换用。
permission 侧重“获准做某事”的权利，常接 to do 或 for；go-ahead 侧重项目、计划、行动“可以开工或继续”的放行，多与 the 连用。
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