I’m very disappointed with my neighbor.she said she would keep her cat off my grass.But she ()为什么用hasn't而不用didn't谢谢!

I’m very disappointed with my neighbor.she said she would keep her cat off my grass.But she ()
为什么用hasn't而不用didn't谢谢!

but she hasn't完整的句子是she hasn't kept her cat off my grass.很显然这是现在完成时,所以你应该明白了为什么不能用didn't,它是过去时,不能体现对现在的影响．

did't

我觉得都可以用，疑问中