No. It has the digraph vowel OI (oy).
moment has a long o sounda long vowel sound is a sound which is the same as, or very similar to the letter name of the vowel.
"Rain" has a long A sound. The letters "ai" are called a "diphthong." This means two vowels that join together to produce just one sound. Rain, pain, and train all have the diphthong "ai" and are all pronounced with the long A sound.
No. The word O has the OY or OI vowel pair, as in join, void, and oil.
No. The vowel sound is the OI/OY pair, as in boy, join, point, and oyster. It is neither long or short.
It has a long "u" sound.
Cake has a long "a" sound.
The long "y" sound is the same as the long "i" sound. The words "my" and "rhyme" have this sound.
"Can I join you?" is the most correct phrase. "Could I join you?" is also acceptable but may sound slightly more formal.
The word "vines" has no A or A sound in it. The word "vanes" has a long A sound.
The OI pair in the word joint is an OY sound that is heard in words such as boy, spoil, and void.
join
The A has a long A sound. The I has a short I sound.