English verb conjugation COULD STUD

Regular verb: stud - studded - studded

Affirmation

Simple form

I could stud
you could stud
she could stud
we could stud
you could stud
they could stud

V-ing form

I could be studding
you could be studding
she could be studding
we could be studding
you could be studding
they could be studding

Perfect

I could have studded
you could have studded
she could have studded
we could have studded
you could have studded
they could have studded

V-ing perfect

I could have been studding
you could have been studding
she could have been studding
we could have been studding
you could have been studding
they could have been studding

Negation

Simple form

I couldn't stud
you couldn't stud
she couldn't stud
we couldn't stud
you couldn't stud
they couldn't stud

V-ing form

I couldn't be studding
you couldn't be studding
she couldn't be studding
we couldn't be studding
you couldn't be studding
they couldn't be studding

Perfect

I couldn't have studded
you couldn't have studded
she couldn't have studded
we couldn't have studded
you couldn't have studded
they couldn't have studded

V-ing perfect

I couldn't have been studding
you couldn't have been studding
she couldn't have been studding
we couldn't have been studding
you couldn't have been studding
they couldn't have been studding

Interrogative form

Simple form

could I stud?
could you stud?
could she stud?
could we stud?
could you stud?
could they stud?

V-ing form

could I be studding?
could you be studding?
could she be studding?
could we be studding?
could you be studding?
could they be studding?

Perfect

could I have studded?
could you have studded?
could she have studded?
could we have studded?
could you have studded?
could they have studded?

V-ing perfect

could I have been studding?
could you have been studding?
could she have been studding?
could we have been studding?
could you have been studding?
could they have been studding?

Interro-negative form

Simple form

couldn't I stud?
couldn't you stud?
couldn't she stud?
couldn't we stud?
couldn't you stud?
couldn't they stud?

V-ing form

couldn't I be studding?
couldn't you be studding?
couldn't she be studding?
couldn't we be studding?
couldn't you be studding?
couldn't they be studding?

Perfect

couldn't I have studded?
couldn't you have studded?
couldn't she have studded?
couldn't we have studded?
couldn't you have studded?
couldn't they have studded?

V-ing perfect

couldn't I have been studding?
couldn't you have been studding?
couldn't she have been studding?
couldn't we have been studding?
couldn't you have been studding?
couldn't they have been studding?

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