Hello, i'm Aymen and i'm a tacher on italki.

French vowels are different and special. Students often have a problem to pronounce some sounds like U when they're studying French. The best way is to practice but not randomly. You must make a note in front of you, glue it on the screen or on your hand to remember to pronounce right the vowel. It needs time but you must keep it in mind to get used to this kind of sounds. The more you practice, the more you get used to think about it.

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Thank you and good luck for studying.