根据时态表，英语总共有十六种时态。

根据您问的个数，我会显出较易的八种。 (先主动，后被动) 一般过去时:The boy wrote a letter. A letter was written by the boy. 一般现在时:The boy writes a letter. A letter is written by the boy. 一般将来时:The boy will write a letter. A letter will be written by the boy. 现在进行时:The boy is writing a letter. A letter is being written by the boy. 过去进行时:The boy was writing a letter. A letter was being written by the boy. 过去完成时:The boy had written a letter. A letter had been written by the boy. 现在完成时:The boy has written a letter. A letter has been written by the boy. 现在完成进行时:The boy has been writing a letter. A letter has been being written by the boy. 如果需要其他时态，请回复