understudy

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

《簡單現在式》
I understudy
You understudy
He understudies
She understudies
It understudies
We understudy
You understudy
They understudy

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

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

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

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

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

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

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

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

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

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