understand

《簡單過去式》
I understood
You understood
He understood
She understood
It understood
We understood
You understood
They understood

《簡單現在式》
I understand
You understand
He understands
She understands
It understands
We understand
You understand
They understand

《簡單未來式》
I will understand
You will understand
He will understand
She will understand
It will understand
We will understand
You will understand
They will understand

《過去進行》
I was understanding
You were understanding
He was understanding
She was understanding
It was understanding
We were understanding
You were understanding
They were understanding

《現在進行》
I am understanding
You are understanding
He is understanding
She is understanding
It is understanding
We are understanding
You are understanding
They are understanding

《未來進行》
I will be understanding
You will be understanding
He will be understanding
She will be understanding.
It will be understanding
We will be understanding
You will be understanding
We will be understanding

《過去完成》
I had understood
You had understood
He had understood
She had understood
It had understood
We had understood
You had understood
They had understood

《現在完成》
I have understood
You have understood
He has understood
She has understood
It has understood
We have understood
You have understood
They have understood

《未來完成》
I will have understood
You will have understood
He will has understood
She will have understood
It will have understood
We will have understood
You will have understood
They will have understood

《過去完成行進》
I had been understanding
You had been understanding
He had been understanding
She had been understanding
It had been understanding
We had been understanding
You had been understanding
They had been understanding

《現在完成行進》
I have been understanding
You have been understanding
He has been understanding
She has been understanding
It has been understanding
We have been understanding
You have been understanding
They have been understanding

《未來完成行進》
I will had been understanding
You will had been understanding
He will had been understanding
She will had been understanding
It will had been understanding
We will had been understanding
You will had been understanding
They will had been understanding