我 [ wo3 ] I; me
--- pronouns in Chinese are the same in subject and object form.
你 [ ni3 ] you (singular)
我的 [ wo3 de5 ] mine (or "my")
--- 的 [ de5 ] is added after pronouns for possession. Can you guess "your(s)"?
是 [ shi4 ] is the verb to be ("am/are/is") when linking two nouns. So...
--- 我是…… [ wo3 shi4... ] is "I am <noun>", and you can work out "You are...".
漂亮 [ piao4 liang5 ] pretty (or "beautiful")
高 [ gao1 ] tall
饿 [ e4 ] hungry
{I can't remember "mean"}
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In the square brackets is pinyin and those numbers are the tones (I used 5 for no tone).
To say something like "I am tall", you can't use the "to be" word I said above because "tall" isn't a noun (actually you can, but it's a bit more complicated to explain). Instead, you can use an adverb like "very" which is 很 [ hen3 ] - so this doesn't always mean "very":
我很高。 [ Wo3 hen3 gao1. ] I am (very) tall.
的 [ de5 ] (the same character as used for possession) is also used with adjectives (which is why irinaielts added it) but this is also a bit more complicated.
So now you hopefully know how to say "I am Jay." and "You are (very) beautiful.".