present
I fasten
You fasten
He fastens
She fastens
It fastens
We fasten
They fasten
past
I fastened
You fastened
He fastened
She fastened
It fastened
We fastened
They fastened
future
I will fasten
You will fasten
He will fasten
She will fasten
It will fasten
We will fasten
They will fasten
conditional
I would fasten
You would fasten
He would fasten
She would fasten
It would fasten
We would fasten
They would fasten