The vowel in "ought." Don't ask Sharon to say it!
See how open her mouth is. There is a good reason doctors ask you to make this sound.
We make the sound in "hot" (/a/) with our mouth open the widest. Pretend you are going to the doctor and saying "ahhhhhhhh".
The sound in "ought" is made with your mouth open not as wide and the sound more in the middle of your mouth. Try to say a very quick, light /ou/ sound. That is the sound in "ought".
The sounds of ought and hot.
Don't worry if you are having problems with this sound! Many native English speakers do, too! New Yorkers pronounce the word "ought" much differently, and many people in the mid-west pronounce the words "caught" and "cot" exactly the same.