what's the difference between take, bring, and carry?
In a hotel, if I want to ask someone to carry my suitcase to a taxi, which sentence is most appropriate? Could you carry my suitcase to a taxi? Could you take my suitcase to a taxi? Could you bring my suitcase to a taxi? Is it possible to use these three interchangeably? Thank you.

Question

what's the difference between take, bring, and carry?
In a hotel, if I want to ask someone to carry my suitcase to a taxi, which sentence is most appropriate?   Could you carry my suitcase to a taxi? Could you take my suitcase to a taxi? Could you bring my suitcase to a taxi?   Is it possible to use these three interchangeably?   Thank you.

Answer

They are not quite interchangeable. The difference lies in direction. For your example, take or carry would work if you were in the hotel room. Bring would be appropriate if you were at or near the taxi. We take something to another location, but bring something to where we are. Carry is neutral, just meaning to transport.
"Every day I take my lunch to school" or "Every day I carry my lunch to school".
"Today at lunchtime I realized I had forgotten to bring my lunch".