I promise that the matter will (be taken care of).
后面为什么有了will还有过去分词?be为什么会出现,明明take care of是动作啊?will不能直接加take care of?
If he had worked harder,he (would have succeeded).
后面为什么要有have succeeded?would后面怎么会加have?
She did not remember (having met) him before.
中间填的having后面为什么不加met的原形?中间能填 to meet吗?
参考资料:自己的经历。