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 couldn't understand
you couldn't understand
he couldn't understand
we couldn't understand
you couldn't understand
they couldn't understand

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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