He said he was very tired that day.
直接引语转变为间接引语有关助动词,时间副词,指示代词,地点状语的变化：
直接引语：间接引语：
ago before
today that day
yesterday the day before
tomorrow the next day
last night the night before
this that
can could
these those
here there
will would
shall should
may might
now hen
记住啦!