English verb conjugation COULD DULL

Regular verb: dull - dulled - dulled

Affirmation

Simple form

I could dull
you could dull
he could dull
we could dull
you could dull
they could dull

V-ing form

I could be dulling
you could be dulling
he could be dulling
we could be dulling
you could be dulling
they could be dulling

Perfect

I could have dulled
you could have dulled
he could have dulled
we could have dulled
you could have dulled
they could have dulled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I dull?
could you dull?
could he dull?
could we dull?
could you dull?
could they dull?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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