1. 我很困 - I am very sleepy -.-zzZ
wo3 hen3 kun4 - in standard pinyin
woh hun kwun - pronunciation in american english

2. 我肚子饿 - I am hungry ><;
wo3 du4 zi5 e4 - in standard pinyin
woh do tzz uh - pronunciation in american english (i tried my best)

3. 再见! - See you again! (^o^)／
zai4 jian4 - in standard pinyin
tzai jyen - pronunciation in american english

Anyone can try these, I'm sure it is almost time to sleep and you are starting to feel hungry then you will say goodbye (See you again) haha

oh yes this is Chinese(Mandarin) of course. And the numbers 1-4 are tonal sounds 5 is just natural tone, just read it plain. Now try to find a Chinese person to try it out and practice it! hehe

你好！this mean 'hello' can be used anytime!it pronaunced 'ni2 hao3' ---in standard pinyin
^-^

谢谢=xie4 xie4=thanks

早上好=zao3 shang4 hao3=good morning
这菜味道很美=zhe4 cai4 wei 4 dao4 hen3 mei3=this dish is tasty!

你吃过早饭了吗？=ni chi guo le ma ？

im not really good in chinese
我有没有男朋友- ni mei you nan peng you. peng is read as something like 'pang'- this means 'do you have a boyfriend?
我有没有怒朋友- ni you mei you nu peng you. do you have a girlfriend?
我当然是没有男朋友- wo dang ran shi mei you nan pang you. - i dont have a boyfriend.
我当然是没有怒朋友 - wo dang ran shi mei you nu peng you. - i dont have a girlfriend.
谢谢- xiexie, of course, means thanks while 谢谢你 - xiexie ni, means thank you.
晚安- (wan'an) is for good night while 晚上好 ( wan shang hao) means good evening.
你会讲英语吗？- ni hui jiang yingyu ma? read as ' ni hui jiang ingyu ma?' which means, do you speak in english? or do you know how to speak in english?
吃饭了吗？- chi fan le ma? - have you eaten already?
and as a response, you could say, 吃饭有- chi fan you, if you have eaten already
or 吃饭没有 (chi fan mei you) if you have not yet eaten. :))

that's all i could HELP for now. :)) lol.

sorry, i had a mistake. ;) 我有没有男朋友? is supposed to be read as n you mei you nan pang you? :D