同学你好，该知识点来自沪江网校《英语零基础直达大学六级【8月班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
say是最普通的用语，着重指说话的内容。及物动词
He said he would say something at the meeting.  

talk 一般用作不及物动词，着重指连续地说话或与人交谈。是不及物动词, 后面跟人的时候用介词with、to 等, 后面跟“事情”要用到介词about
I shall talk to your father about your health.  

宾语从句的时态：

1、主句是一般现在时，从句根据实际情况使用任何时态。

例句：

She says (that) she works from Monday to Friday.
她说她从周一至周五上班。(从句是一般现在时）  

She says (that) she will leave a message on his desk.
她说她要在他桌子上留个便条。（从句是一般将来时）

2、主句是过去时态，从句须用过去时态的某种形式。

例句：

He said there were no classes yesterday afternoon.
他说昨天下午没有课。   （从句是一般过去时）  

He said (that) he was going to take care of the baby.
他说他会去照看这个婴儿。  （从句是过去将来时）

1. told ⋯ would come  tell sb sth 告诉某人某事，主句是过去时，从句用过去时态，相对于过去的将来，过去将来时。
3 told ⋯ had never played 过去的过去，发生在told之前。
4 did he say ⋯ had done/ would do 发生在过去之前，或者在过去的将来
5 did he tell ⋯ (had) bought/ would buy 有did后动词用原形；发生在过去之前，或者在过去的将来
6 said ⋯ could not 强调说话的内容用said
8 told ⋯ wrote 告诉某人某事，用told，注意write的过去式是wrote
9 did you say ⋯ were/ had been 从句也要用过去时态。

祝同学学习进步~