Hello! My first time here So you cannot put O after V 走、but you can still say, 学校 (你) 怎么 走? How do you explain this grammatically? The language teacher told me in this case, 学校 is S. I don't understand. You can say, 你 怎么 去 学校？ So you can also say 学校 (你) 怎么 去？since 学校 is O and you just put O at the beginning of the sentence to make O a topic of the sentence. But how does the first sentence work?