At work, I track down the Englishes. Outside, it's the Englishes that are the most interesting. You can learn a lot about Chinese sentence structure from all the Englishes between it and the American English you speak. You begin to anticipate other structures. Some say it's impossible to resist the temptation to use Chenglish: you can talk faster, goes the reasoning. Makes my job harder, though. Reinforces bad habits in others. A teacher ought to understand the context of a tense.