toughen

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

《簡單現在式》
I toughen
You toughen
He toughens
She toughens
It toughens
We toughen
You toughen
They toughen

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

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

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

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

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

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

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

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

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

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