Present
I    abstain
you  abstain
he   abstains
we   abstain
you  abstain
they abstain

Perfect
I    have abstained
you  have abstained
he   has abstained
we   have abstained
you  have abstained
they have abstained

Past
I    abstained
you  abstained
he   abstained
we   abstained
you  abstained
they abstained

Pluperfect
I    had abstained
you  had abstained
he   had abstained
we   had abstained
you  had abstained
they had abstained

Future
I    will abstain
you  will abstain
he   will abstain
we   will abstain
you  will abstain
they will abstain

Future perfect
I    will have abstained
you  will have abstained
he   will have abstained
we   will have abstained
you  will have abstained
they will have abstained

Present
I    abstain
you  abstain
he   abstain
we   abstain
you  abstain
they abstain

Present
I    have abstained
you  have abstained
he   have abstained
we   have abstained
you  have abstained
they have abstained

Imperfect
I    abstained
you  abstained
he   abstained
we   abstained
you  abstained
they abstained

Pluperfect
I    had abstained
you  had abstained
he   had abstained
we   had abstained
you  had abstained
they had abstained

Present
I    would abstain
you  would abstain
he   would abstain
we   would abstain
you  would abstain
they would abstain

Perfect
I    would have abstained
you  would have abstained
he   would have abstained
we   would have abstained
you  would have abstained
they would have abstained

Present
I    am abstaining
you  are abstaining
he   is abstaining
we   are abstaining
you  are abstaining
they are abstaining

Perfect
I    have been abstaining
you  have been abstaining
he   has been abstaining
we   have been abstaining
you  have been abstaining
they have been abstaining

Past
I    was abstaining
you  were abstaining
he   was abstaining
we   were abstaining
you  were abstaining
they were abstaining

Pluperfect
I    had been abstaining
you  had been abstaining
he   had been abstaining
we   had been abstaining
you  had been abstaining
they had been abstaining

Future
I    will be abstaining
you  will be abstaining
he   will be abstaining
we   will be abstaining
you  will be abstaining
they will be abstaining

Future perfect
I    will have been abstaining
you  will have been abstaining
he   will have been abstaining
we   will have been abstaining
you  will have been abstaining
they will have been abstaining

Present
I    would be abstaining
you  would be abstaining
he   would be abstaining
we   would be abstaining
you  would be abstaining
they would be abstaining

Perfect
I    would have been abstaining
you  would have been abstaining
he   would have been abstaining
we   would have been abstaining
you  would have been abstaining
they would have been abstaining