Identify the adverb clause: We’ll be sitting in the conference room until they tell us to leave.

• এখানে adverb clause হলো - until they tell us to leave
• Adverb clause:
- যে subordinate clause কোনো averb এর মতো কাজ করে তাকে Adverb clause বলে।
-Adverb এর মতো এরা time, place, cause, effect, purpose এসব বুঝায়।
- Adverbial clause of time শুরু হয় as, as soon as, before, after, hardly...when, no sooner ... than, till, untill, since ইত্যাদি দিয়ে।
-  তাই until they tell us to leave এই clause টি হলো adverb clause.