过去 I did laundry.
I was doing laundry.
They were doing laundry.
I had done laundry.
I had been doing laundry.
现在
I do laundry.
He does laundry.
I'm doing laundry.
We are doing laundry.
I have done laundry.
I have been doing laundry.
未来
We will do laundry tomorrow.
We will be doing laundry.
We will have done laundry.
We will have been doing laundry.
虚拟语气would
We would do laundry tomorrow.
We would be doing laundry.
We would have done laundry.
We would have been doing laundry.
虚拟语气should
We should do laundry tomorrow.
We should be doing laundry.
We should have done laundry.
We should have been doing laundry.
虚拟语气could
We could do laundry.
这句话暗示了现在或将来的可能性或建议。
We could be doing laundry.
这也暗示了一个建议，但将动作置于现在进行时态。 它提出了一种现在可能发生的替代行动。 例如，如果有人感到无聊或正在寻找一些有成效的事情做，他们可能会这么说。
We could have done laundry.
这表示过去错过了机会或可能性。 演讲者正在思考哪些事情本来可以做，但没有做。
We could have been doing laundry.
这句话将过去进行时与假设情况结合起来，表明在过去的某个特定时间里，他们有机会正在洗衣服，但没有。 它常常带有一种对如何度过时间的遗憾或事后认识的语气。
