English verb conjugation COULD OBSESS

Regular verb: obsess - obsessed - obsessed

Affirmation

Simple form

I could obsess
you could obsess
he could obsess
we could obsess
you could obsess
they could obsess

V-ing form

I could be obsessing
you could be obsessing
he could be obsessing
we could be obsessing
you could be obsessing
they could be obsessing

Perfect

I could have obsessed
you could have obsessed
he could have obsessed
we could have obsessed
you could have obsessed
they could have obsessed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I obsess?
could you obsess?
could he obsess?
could we obsess?
could you obsess?
could they obsess?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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