Hello! Ni Hao!
Good morning! Zao Shang Hao!
Good afternoon! Xia Wu Hao!
Good evening! Wan Shang Hao!
Good night! Wan An!
Sorry. Dui Bu Qi (or Bao Qian).
Excuse me (or us) Lao Jia (or Qing Yuan Liang).
Thank you! Xie Xie!
Very Good! Hen Hao!
Good-Bye! Zai Jian!
My name is David. Wo Jiao David.
I am from America (Canada or UK). Wo Cong Mei Guo (Jia Na Da or Ying Guo) Lai. 
I get lost. Please help? Wo Mi Lu Le, Qing Bang Zhu?
Do you speak English? Ni Jiang Ying Yu Ma?
I want to go to hotel. Wo Yao Qu Jiu Dian.
This is the address. Zhe Shi Di Zhi.
Where can I find  washroom? Nar You Ce Suo?
Where is the entrance? Ru Kou Zai Na Li?
Where is the exit. Chu Kou Zai Na Li?
Where can I find a telephone Nar You Dian Hua?
I am hungry (thirsty or tired) Wo Er (Ke, Lei) Le. 
How much? Duo Shao Qian?
Too Expensive. Tai Gui La.
I don't want this one. Wo Bu Yao Zhe Ge.
Do you have anything cheaper? You Pian Yi De Ma?
This one is very beautiful Zhe Ge Hen Piao Liang.
This one is too big (or small). Zhe Ge Tai Da (Xiao). 
East, West, South, North Dong, Xi, Nan, Bei. 
Red, Green, Yellow, Blue, Black, White. Hong, Lu, Huang, Lan, Hei, Bai. 
Big, Small Da, Xiao
Heavy, Light Zhong, Qing
Long, Short Chang, Duan