The /th/ sound is one of the most difficult sounds to master for English language learners. Even many native speakers struggle to learn to pronounce it correctly. The /th/ sound is made by placing the tip of your tongue between your teeth and blowing out a small amount of air.
It is helpful to practice the /th/ sound by saying words that contain the /th/ sound repeatedly. Some examples of words that contain the /th/ sound are “think,” “thing,” “them,” “that,” and “then.” Say these words out loud and focus on the /th/ sound as you say them. Pay attention to how your tongue is positioned in your mouth as you say the words. The tip of your tongue should be touching your top teeth, and you should be blowing out a small amount of air as you say the word.
If you are having trouble pronouncing the /th/ sound, it may be helpful to look in the mirror as you practice. This can help you see how your tongue is positioned in your mouth as you say the /th/ sound. You can also try saying the /th/ sound with a partner or teacher who can give you feedback on your pronunciation.