English verb conjugation COULD THINK BACK

Regular verb: think back - think backed - think backed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form

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

V-ing form

I could be think backing
you could be think backing
he could be think backing
we could be think backing
you could be think backing
they could be think backing

Perfect

I could have think backed
you could have think backed
he could have think backed
we could have think backed
you could have think backed
they could have think backed

V-ing perfect

I could have been think backing
you could have been think backing
he could have been think backing
we could have been think backing
you could have been think backing
they could have been think backing

Negation

Simple form

I couldn't think back
you couldn't think back
he couldn't think back
we couldn't think back
you couldn't think back
they couldn't think back

V-ing form

I couldn't be think backing
you couldn't be think backing
he couldn't be think backing
we couldn't be think backing
you couldn't be think backing
they couldn't be think backing

Perfect

I couldn't have think backed
you couldn't have think backed
he couldn't have think backed
we couldn't have think backed
you couldn't have think backed
they couldn't have think backed

V-ing perfect

I couldn't have been think backing
you couldn't have been think backing
he couldn't have been think backing
we couldn't have been think backing
you couldn't have been think backing
they couldn't have been think backing

Interrogative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

could I have been think backing?
could you have been think backing?
could he have been think backing?
could we have been think backing?
could you have been think backing?
could they have been think backing?

Interro-negative form

Simple form

couldn't I think back?
couldn't you think back?
couldn't he think back?
couldn't we think back?
couldn't you think back?
couldn't they think back?

V-ing form

couldn't I be think backing?
couldn't you be think backing?
couldn't he be think backing?
couldn't we be think backing?
couldn't you be think backing?
couldn't they be think backing?

Perfect

couldn't I have think backed?
couldn't you have think backed?
couldn't he have think backed?
couldn't we have think backed?
couldn't you have think backed?
couldn't they have think backed?

V-ing perfect

couldn't I have been think backing?
couldn't you have been think backing?
couldn't he have been think backing?
couldn't we have been think backing?
couldn't you have been think backing?
couldn't they have been think backing?

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