英语八大时态的基本结构如下：
一般现在时：主语 + 动词原形 + 其他
例如：I often watch TV in the evening.
一般过去时：主语 + 动词的过去式 + 其他
例如：She worked in the office last week.
一般将来时：主语 + will + 动词原形 + 其他
例如：It will rain tomorrow.
过去将来时：主语 + would + 动词原形 + 其他
例如：He said he would come to see me the next day.
现在进行时：主语 + am/is/are + 动词的现在分词 + 其他
例如：They are playing basketball now.
过去进行时：主语 + was/were + 动词的现在分词 + 其他
例如：They were playing basketball at this time yesterday.
现在完成时：主语 + have/has + 动词的过去分词 + 其他
例如：I have finished my homework.
过去完成时：主语 + had + 动词的过去分词 + 其他
例如：She had finished her work before we came.
