occur

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

《簡單現在式》
I occur
You occur
He occurs
She occurs
It occurs
We occur
You occur
They occur

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

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

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

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

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

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

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

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

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

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