If you're a non-native English speaker, learning how to correctly pronounce boost can be challenging. However, with a few simple tips, you can master this tricky word.

To start, place the tip of your tongue behind your top teeth. Then, form an "oo" sound ("b" is a voiced sound, meaning your vocal cords should vibrate when making this sound). This should sound like "boo."

Next, move your tongue to the roof of your mouth and form an "st" sound, which should sound like "st." Put the two sounds together, and you should get "boost." Make sure you don't add any extra sounds between the "oo" and "st."

Finally, practice saying the word a few times. Make sure you don't over-emphasize the "st" sound, and that you don't change the pitch of your voice. Boost should be said at the same pitch throughout.

Once you've mastered boost, you're well on your way to mastering other tricky English words. Keep up the practice and you'll be a pro in no time!