She said: “He will be busy.”→ She said that he would be busy.为什么will 要改成would?意思不是 她说,他没有时间的意思吗? 那为什么改成间接引语will要变成would?

问题描述:

She said: “He will be busy.”→ She said that he would be busy.
为什么will 要改成would?意思不是 她说,他没有时间的意思吗? 那为什么改成间接引语will要变成would?