I
Wo
You
Ni/Ni Men(pl.)
Please
Qing
Yes
Dui
No
Bu/Bu Shi/Bu Dui
Sorry
Dui Bu Qi/Bao Qian
It doesn't matter
Mei Guan Xi
No problem
Mei Wen Ti
Happy
Gao Xin
Love
Xi Huan/Ai
Thank you
Xie Xie
You're Welcome
Bu Ke Qi