[u] and [uw]

[u]

[u] is articulated with the back of the tongue raised close to the roof of the mouth. The lips are a little rounded.

[uw]

The articulation of [uw] is similar to that of [uw], except that the lips are closer together and more rounded, as if whistling. The vowel is diphthongized.

could ~ cooed

should ~ shoed

stood ~ stewed

look ~ Luke

took ~ two

book ~ boot

If Stu chews shoes, should Stu choose the shoes he chews?

Ruth moved on to cook the soup but added too much roux and it turned into a stew.

Luke looked at that blue book about blues roots.

Brook understood the cartoon but it took her too much time.

This fool took that food and wolfed it down at full moon.