Tonight I went for a walk. Someone yelled in English, "Hello, how are you?!" I turned to look because so far I'm the only non-Chinese person I've seen (outside of my school) and so whenever I have heard anyone speaking English so far, it has been directed at me. He was laughing with his buddies in that "look at the silly American" way, and they didn't seem very friendly, so I quickly replied in Mandarin, "I can't speak English!" and went on my way. I doubt they believed me.
wǒ bú huì shuō yīngwén ("I can't speak English" -- I hope this is right, but may have the tones wrong.)