一般现在时：He often finishes it before 9:00 p.m.
一般过去时：He finished it yesterday.
一般将来时：He will finish it tomorrow.
现在进行时：He is finishing it.
过去进行时：He was finishing it at that time.
现在完成时: He has finished it successfully.
过去完成时：He had finished it before 9:00 last night.
过去将来时：He said he would finish it the next day.