一般过去时:I went to school yesterday.
现在进行时:I am going to school now.
一般将来时:I will go to school tomorrow.
现在完成时:I have gone to school since I was five years old.
过去完成时:I had gone to school before I was five years old.
一般过去时:I went to school yesterday.
现在进行时:I am going to school now.
一般将来时:I will go to school tomorrow.
现在完成时:I have gone to school since I was five years old.
过去完成时:I had gone to school before I was five years old.