present
I knock
You knock
He knocks
She knocks
It knocks
We knock
They knock
past
I knocked
You knocked
He knocked
She knocked
It knocked
We knocked
They knocked
future
I will knock
You will knock
He will knock
She will knock
It will knock
We will knock
They will knock
conditional
I would knock
You would knock
He would knock
She would knock
It would knock
We would knock
They would knock