concentrate

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

《簡單現在式》
I concentrate
You concentrate
He concentrates
She concentrates
It concentrates
We concentrate
You concentrate
They concentrate

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

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

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

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

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

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

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

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

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

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