直接引语变为间接引语时，若主句为过去时态，变为间接引语的宾语从句的时态如下表： 直接引语 间接引语 一般现在时 一般过去时 一般过去时 过去完成时 一般将来时 过去将来时 现在进行时 过去进行时 现在完成时 过去完成时 过去完成时 过去完成时（不变） 过去进行时 过去进行时（不变） can could may might must must/ had to 祈使句 不定式 如果直接引语中的情态动词没有过去时的形式（例：ought to， had better, used to，must, need)和已经是过去时的形式时，（例：could, should, would, might）不再变。
2时间状语，地点状语，指示代词、动词
直接引语变为间接引语时，有些时间状语，地点状语，指示代词和动词也要作相应的变动。 直接引语 间接引语 时间状语 now 现在 then 那时；当时 时间状语 today 今天 that day 那天 时间状语 tonight 今晚 that night 那天晚上 时间状语 this week 本周 that week 上周 时间状语 yesterday 昨天 the day before前一天 时间状语 the day before yesterday 前天 two days before 前两天 时间状语 three days ago三天以前 three days before 前三天 时间状语 last week 上周 the last week 前一周 时间状语 tomorrow 明天 the next day /the following day第二天 时间状语 next week 下周 the next week 第二个星期 时间状语 next month下个月 the following month第二个月 时间状语 this morning这个早晨 that morning那个早晨 时间状语 ago/last以前/最后 before之前 指示代词 this 这 that 那 指示代词 these 这些 those 那些 地点状语 here 这里 there 那里 动词 come 来 go 去 动词 bring带来 take带去 注：直接引语转换成间接引语时的变化应视实际情况而定。假如就在当天转述，today，yesterday，tomorrow等就不需改变；如果在当地转述，here也不必改为there，come也不必改为go。另外，直接引语中有具体的过去某年、某月、某日作状语，变为间接引语时，时态不变。 ①直接引语如果是陈述句，间接引语应改为由that引导的宾语从句。如：
She said, Our bus will arrive in five minutes.
→She said that their bus would arrive in five minutes.
②直接引语如果是反意疑问句、选择疑问句或一般疑问句，间接引语应改为由whether或if引导的宾语从句.
如：
He said, Can you swim, John?
→He asked John if he could swim.
You have finished the homework, haven‘t you? my mother asked.
→My mother asked me whether I had finished the homework.
Do you go to school by bus or by bike?
→He asked me if I went to school by bus or by bike.
③直接引语如果是特殊问句，间接引语应该改为由疑问代词或疑问副词引导的宾语从句（宾语从句必须用陈
述句语序）。
She asked me, When do they have their dinner?
→ She asked me when they had their dinner.
④直接引语如果是祈使句，间接引语应改为tell (ask) sb (not) to do sth.句型。
Don’t make any noise, she said to the children.
→She told (ordered) the children not to make any noise.
Bring me a cup of tea, please, said she.
→She asked him to bring her a cup of tea.
⑤直接引语如果是以“Let‘s”开头的祈使句，变为间接引语时，通常用“suggest +动名词（或从句）。”如：
He said, Let’s go to the film.
→He suggested going to the film.
或He suggested that they should go to see the film.
⑥直接引语是感叹句时，间接引语为what 或how 引导，也可以用that 引导。
She said, What a lovely day it is !
→She said what a lovely day it was .或She said that it was a lovely day.
⑦如果直接引语中含有since, when, while 引导的表示过去时间的状语从句，在变为间接引语时，只改变主句中的谓语动词，从句的一般过去时则不变。如：
He said to me, I have taught English since he came here .
→He told me that he had taught English since he came here. 遵从一主二宾三不变
一主： 从句的第一人称随主句的主语变化。
eg： “I have bought an expensive car , ” said the boss.→The boss said he had bought an expensive car.
二宾： 从句的第二人称随主句的宾语变化。
eg: I often tell him , You are the luckiest boy I have ever seen . → I often tell him he is the luckiest boy I have ever seen . “
三不变：从句的第三人称不需要变化。 在以下几种情况下。在直接引语变为间接引语时，时态一般不变化。
①直接引语是客观真理。
②直接引语如果是一般现在时。表示一种反复出现或习惯性的动作，变间接引语，时态不变。如：
He said, I get up at six every morning。 →He said he gets up at six every morning。
③当直接引语表示为名人名言或谚语时,时态不变.
④若直接引语为客观真理，时态不变，常考的有：
Light travels faster than sound.光速比声速快
The earth goes around the sun.地球绕着太阳转
The moon goes around the earth.月球绕着地球转
