With a single-reed instrument, double tonguing is very hard to do efficiently. That includes the clarinet. With that said, double tonguing is a skill that will not work well on the clarinet. However, it does have its benefits. If you are up to the challenge of double tonguing, here is how to do it.

• Just like you can demonstrate tonguing by saying "ta-ta-ta-ta-ta", etc., yo can demonstrate double tonguing by saying "tu-gu-tuh-ga-tuh-ga-tuh-ga-tuh-ga", etc.
• Go back and forth between saying "tuh" and "guh". Do it enough to get used to it. "tuh kuh tuh kuh tuh kuh tuh kuh"
• Just put you instrument up to your mouth and blow saying "tuh kuh tuh kuh tuh kuh".
• This might take some practice.