English verb conjugation COULD DECUPLE

Regular verb: decuple - decupled - decupled

Affirmation

Simple form

I could decuple
you could decuple
he could decuple
we could decuple
you could decuple
they could decuple

V-ing form

I could be decupling
you could be decupling
he could be decupling
we could be decupling
you could be decupling
they could be decupling

Perfect

I could have decupled
you could have decupled
he could have decupled
we could have decupled
you could have decupled
they could have decupled

V-ing perfect

I could have been decupling
you could have been decupling
he could have been decupling
we could have been decupling
you could have been decupling
they could have been decupling

Negation

Simple form

I couldn't decuple
you couldn't decuple
he couldn't decuple
we couldn't decuple
you couldn't decuple
they couldn't decuple

V-ing form

I couldn't be decupling
you couldn't be decupling
he couldn't be decupling
we couldn't be decupling
you couldn't be decupling
they couldn't be decupling

Perfect

I couldn't have decupled
you couldn't have decupled
he couldn't have decupled
we couldn't have decupled
you couldn't have decupled
they couldn't have decupled

V-ing perfect

I couldn't have been decupling
you couldn't have been decupling
he couldn't have been decupling
we couldn't have been decupling
you couldn't have been decupling
they couldn't have been decupling

Interrogative form

Simple form

could I decuple?
could you decuple?
could he decuple?
could we decuple?
could you decuple?
could they decuple?

V-ing form

could I be decupling?
could you be decupling?
could he be decupling?
could we be decupling?
could you be decupling?
could they be decupling?

Perfect

could I have decupled?
could you have decupled?
could he have decupled?
could we have decupled?
could you have decupled?
could they have decupled?

V-ing perfect

could I have been decupling?
could you have been decupling?
could he have been decupling?
could we have been decupling?
could you have been decupling?
could they have been decupling?

Interro-negative form

Simple form

couldn't I decuple?
couldn't you decuple?
couldn't he decuple?
couldn't we decuple?
couldn't you decuple?
couldn't they decuple?

V-ing form

couldn't I be decupling?
couldn't you be decupling?
couldn't he be decupling?
couldn't we be decupling?
couldn't you be decupling?
couldn't they be decupling?

Perfect

couldn't I have decupled?
couldn't you have decupled?
couldn't he have decupled?
couldn't we have decupled?
couldn't you have decupled?
couldn't they have decupled?

V-ing perfect

couldn't I have been decupling?
couldn't you have been decupling?
couldn't he have been decupling?
couldn't we have been decupling?
couldn't you have been decupling?
couldn't they have been decupling?

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