What: I don't know what to do next. 我不知道接下来要做什么 How: She wondered how to win the game. 她想知道怎么赢的比赛。 where: He was thinking about where to look for his dog. Which: She don't know which answer to be the right one Why; I finally understood why he hated me.. 希望能帮到你 望采纳