现在完成时I have just finished the homework.我刚做完作业.
过去进行时We were having supper when the phone rang.我们正在吃晚饭时电话响了.
被动语态My shoes had been cleaned by somebody.
有人已把我的鞋子擦了.
现在完成时I have just finished the homework.我刚做完作业.
过去进行时We were having supper when the phone rang.我们正在吃晚饭时电话响了.
被动语态My shoes had been cleaned by somebody.
有人已把我的鞋子擦了.