English verb conjugation COULD THINK

Irregular verb: think - thought - thought

Affirmation

Simple form

I could think
you could think
he could think
we could think
you could think
they could think

V-ing form

I could be thinking
you could be thinking
he could be thinking
we could be thinking
you could be thinking
they could be thinking

Perfect

I could have thought
you could have thought
he could have thought
we could have thought
you could have thought
they could have thought

V-ing perfect

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

Negation

Simple form

I could not think
you could not think
he could not think
we could not think
you could not think
they could not think

V-ing form

I could not be thinking
you could not be thinking
he could not be thinking
we could not be thinking
you could not be thinking
they could not be thinking

Perfect

I could not have thought
you could not have thought
he could not have thought
we could not have thought
you could not have thought
they could not have thought

V-ing perfect

I could not have been thinking
you could not have been thinking
he could not have been thinking
we could not have been thinking
you could not have been thinking
they could not have been thinking

Interrogative form

Simple form

could I think?
could you think?
could he think?
could we think?
could you think?
could they think?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not think?
could you not think?
could he not think?
could we not think?
could you not think?
could they not think?

V-ing form

could I not be thinking?
could you not be thinking?
could he not be thinking?
could we not be thinking?
could you not be thinking?
could they not be thinking?

Perfect

could I not have thought?
could you not have thought?
could he not have thought?
could we not have thought?
could you not have thought?
could they not have thought?

V-ing perfect

could I not have been thinking?
could you not have been thinking?
could he not have been thinking?
could we not have been thinking?
could you not have been thinking?
could they not have been thinking?

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