English verb conjugation COULD UNDERSEAL

Regular verb: underseal - undersealed - undersealed

Affirmation

Simple form

I could underseal
you could underseal
he could underseal
we could underseal
you could underseal
they could underseal

V-ing form

I could be undersealing
you could be undersealing
he could be undersealing
we could be undersealing
you could be undersealing
they could be undersealing

Perfect

I could have undersealed
you could have undersealed
he could have undersealed
we could have undersealed
you could have undersealed
they could have undersealed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I underseal?
could you underseal?
could he underseal?
could we underseal?
could you underseal?
could they underseal?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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