he said that the new teacher (would）give us a lesson thenwould 可不可以换成will

he said that the new teacher (would）give us a lesson thenwould 可不可以换成will
he said that the new teacher (would）give us a lesson then
would 可不可以换成will

he said that the new teacher (would）give us a lesson thenwould 可不可以换成will
不可以的,would give 是表示过去将来时态
换成will 时态不对

不可以，因为前面的said，所以后面从句时态要一致。

不
因为前面的动词是said，是过去的将来，用would

不能，因为主语是过去时，从句除了客观事实等特殊情况之外必须使用过去的时态（一般过去，过去完成，过去将来等），would是will的过去式