usually只是个副词，它不能决定句子的动词，动词和时态、语态有关 比如，I usually go to school by bike. She usually goes to school by bike. She usually went to school by bike last year.
看句子的主语， 如果句子的主语是动作的执行者，那就是用主动的进行时态。 is he going to school today？ 主语he是动作go的执行者，所以用主动的进行时态。 如果句子的主语是动作的承受着，那就用被动时态。 is your homework done？ 主语homework是动作do的承受者，所以用被动。