英语/第5课

英语有16种时态，为（以buy为例）：

	一般时	进行时	完成时	完成进行时
现在	buy/buys	be buying	have/has had	have/has been buying
过去	bought	be buying	had had	had been buying
将来	will buy/be going to buy	will be buying	will have had	will have been buying
过去将来	would buy	would be buying	would have had	would have been buying

在下面的课程中，我们会一一作介绍。