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.