1、give the green light
開綠燈，批準 ，相當于agree
2、give sb the green light
We are ready to build a great bridge over the river. We are just waiting for the municipal government to give us the green light.
我們已做好了在河上建一座大橋的準備，現在正等待市政府的批準。
3、give sb the green light to-v
Mother gave us the green light to go on the camping trip.
母親準許我們野營旅行。