English verb conjugation COULD UNDERSTAND

Irregular verb: understand - understood - understood

Affirmation

Simple form

I could understand
you could understand
he could understand
we could understand
you could understand
they could understand

V-ing form

I could be understanding
you could be understanding
he could be understanding
we could be understanding
you could be understanding
they could be understanding

Perfect

I could have understood
you could have understood
he could have understood
we could have understood
you could have understood
they could have understood

V-ing perfect

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

Negation

Simple form

I could not understand
you could not understand
he could not understand
we could not understand
you could not understand
they could not understand

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I understand?
could you understand?
could he understand?
could we understand?
could you understand?
could they understand?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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