Learn the two different ways to pronounce the article “the”. Sometimes we pronounce it as “thee” with a long /i/ sound. Learn the rules in this video. But first, make sure that you can correctly pronounce the TH sound. Lightly touch your upper teeth with the tip of your tongue. There should be a vibration of air that comes out between your tongue and your upper teeth. Don’t press your tongue too hard because this will block the air flow, and then the “th” will sound like a “d” instead.
At the end of this video there are exercises for you to practice using “the” quickly in sentences.