同学你好，该知识点来自沪江网校《英语零基础直达大学四级【抢学班】》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
He__he__(cannot) understand me.
said ,could not

He__that he__(work) all day yesterday.
said ,had worked
间接引语中,引句要向过去推一个时态     一般现在---〉一般过去        一般过去---〉过去完成
注：要还原成直接引语的时态再考虑
He__me he never__(write) letters to anybody.
told , had never written

祝学习愉快哦