present
I lighten
You lighten
He lightens
She lightens
It lightens
We lighten
They lighten
past
I lightened
You lightened
He lightened
She lightened
It lightened
We lightened
They lightened
future
I will lighten
You will lighten
He will lighten
She will lighten
It will lighten
We will lighten
They will lighten
conditional
I would lighten
You would lighten
He would lighten
She would lighten
It would lighten
We would lighten
They would lighten