English verb conjugation COULD DISTINGUISH

Regular verb: distinguish - distinguished - distinguished

Affirmation

Simple form

I could distinguish
you could distinguish
she could distinguish
we could distinguish
you could distinguish
they could distinguish

V-ing form

I could be distinguishing
you could be distinguishing
she could be distinguishing
we could be distinguishing
you could be distinguishing
they could be distinguishing

Perfect

I could have distinguished
you could have distinguished
she could have distinguished
we could have distinguished
you could have distinguished
they could have distinguished

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I distinguish?
could you distinguish?
could she distinguish?
could we distinguish?
could you distinguish?
could they distinguish?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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