很（hen3）高（gao1）兴（xing4）认（ren4）识（shi2）你（ni3）=it's nice to meet you

have you had dinner? = 你（ni 3）吃（chi 1）饭 （fan 4） 没 （mei 2）有（you 3） how are you recently? = 最（zui 4 ) 近 (jin 4) 过(guo 4) 得(de 2) 怎(zen 3) 么(me 1) 样(yang 4)？ what are you doing now? = 你（ni 3) 正 (zheng 4) 在(zai 4) 做(zuo 4) 什(shen 3) 么(me 1)？

mavi,if you want to say"good morning"in chinese ,you can say"zao shang hao"(早上好),or you can only say "zao ";"good afternoon"in china,you can say"xia wu hao",but,we usually not say "xia wu hao","good evening"means"wan shang hao"(晚上好)；"see you soon",you can say "dai hui er jian"(待会儿见)

good morning = 早上好 =zao shang hao good afternoon =下午好 =xia wu hao good evening = 晚上好 =wan shang hao see u soon = 一会儿见=yi hui er jian

吃了吗？chi le ma?you can use it to greet people at the time for lunch or supper.it means have you had your lunch or dinner.the answer is not important.saying it to your neighbours or friends would make them feel that you are very cordial.