一般现在时:表示习惯性的动作或状态,或者客观真理。----I always go to the gym in the morning.
现在进行时:表示现在正在进行的动作。----She is studying for her exams right now.
现在完成时:表示过去发生的动作对现在的影响或结果。----He has finished his homework already.
一般过去时:表示过去发生的动作或状态。----I went to the park yesterday.
过去进行时:表示过去某一时刻正在进行的动作。----They were watching a movie when I called them.
过去完成时:表示过去某一时刻之前已经完成的动作。----She had already eaten dinner before I arrived.
现在完成进行时:表示从过去某一时刻开始一直持续到现在的动作。----He has been working on this project for two weeks.
将来进行时:表示将来某一时刻正在进行的动作。----They will be playing soccer at 3 PM tomorrow.
将来完成时:表示将来某一时刻之前将要完成的动作。----By next year, she will have graduated from college.
现在完成时被动语态:表示过去发生的动作对现在的影响或结果,且强调动作的承受者。----The cake has been eaten by someone.
一般将来时被动语态:表示将来要发生的动作,且强调动作的承受者。----The book will be published next month.