Should I ask for permission to begin in a GD?

NO, this is one of the worst things you can say in a group debate. You could come out as ineffective if you don’t have a chance to inquire. Pick the perfect moment to enter the conversation and avoid being disrespectful to the person who spoke before you. Avoid using the cliché “excuse me” and instead use rejoinders like “I agree but…”, “Let me explain that…”, and so on. This is impolite and might be interpreted as sarcasm. Begin by addressing the group as a whole before diving right into the topic.