English verb conjugation COULD COLLABORATE

Regular verb: collaborate - collaborated - collaborated

Affirmation

Simple form

I could collaborate
you could collaborate
he could collaborate
we could collaborate
you could collaborate
they could collaborate

V-ing form

I could be collaborating
you could be collaborating
he could be collaborating
we could be collaborating
you could be collaborating
they could be collaborating

Perfect

I could have collaborated
you could have collaborated
he could have collaborated
we could have collaborated
you could have collaborated
they could have collaborated

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I collaborate?
could you collaborate?
could he collaborate?
could we collaborate?
could you collaborate?
could they collaborate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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