present
I tumble
You tumble
He tumbles
She tumbles
It tumbles
We tumble
They tumble
past
I tumbled
You tumbled
He tumbled
She tumbled
It tumbled
We tumbled
They tumbled
future
I will tumble
You will tumble
He will tumble
She will tumble
It will tumble
We will tumble
They will tumble
conditional
I would tumble
You would tumble
He would tumble
She would tumble
It would tumble
We would tumble
They would tumble