What are some common phrases in Mandarin Chinese?
I want to learn Mandarin.
There are many phrases and I don’t know which type you want or how much you already know.
I hope you can find some of these helpful 
你好 ni hao = Hello
早上好 zao shang hao = Good morning
下午好 xia wu hao = Good afternoon
晚上好 wan shang hao = Good evening
你叫什么名字？ ni jiao shen me ming zi = What’s your name?
见到你很高兴 jian dao ni hen gao xing = Pleased to meet you
好久不见 hao jiu bu jian = Long time no see
你过得如何？ ni guo de ru he? = How have you been?
有什么新鲜事吗? you shen me xin xian shi ma? = What’s new?
你好吗？ ni hao ma? = How are you?
我很好 wo hen hao = I’m fine
你呢？ ni ne? = and you?
你忙吗？ ni mang ma? = Are you busy?
我很烦 wo hen fan = I’m very bored
现在几点钟？ xian zai ji dian zhong? = Do you have the time?
谢谢 xie xie = Thanks
不客气 bu ke qi = You’re welcome
对不起 dui bu qi = Sorry
没事儿 mei shir = No problem
休想! （算了!） xiu xiang or can say (suan le) = Forget it
很抱歉打扰你 hen bao qian da rao ni = Sorry to disturb you
你在干什么？ ni zai gan shen me? = What are you doing?
我在听音乐 wo zai ting yin yue = I’m listening to music
有意思 you yi si = interesting
我累死了 wo lei si le = I’m dead tired
上床睡觉 shang chuang shui jiao = Hit the hay
睡个好觉 shui ge hao jiao = Have a good sleep/sleep well
我不知道 wo bu zhi dao = I don’t know
你怎么知道的？ ni zen me zhi dao de = How do you know?
再见 zai jian = Goodbye
明天见 ming tian jian = See you tomorrow
恭喜了！ gong xi le = Congratulations
生日快乐 sheng ri kuai le = Happy birthday
我爱你 wo ai ni = I love you
我的狗吃了我的作业 wo de gou chi le wo de zuo ye = My dog ate my homework (always good to know, lol)
Learn Chinese – Most Used Expression