English verb conjugation COULD UNDERSTAND

Irregular verb: understand - understood - understood

Affirmation

Simple form

I could understand
you could understand
she could understand
we could understand
you could understand
they could understand

V-ing form

I could be understanding
you could be understanding
she could be understanding
we could be understanding
you could be understanding
they could be understanding

Perfect

I could have understood
you could have understood
she 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
she 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
she 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
she 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
she 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
she 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 she understand?
could we understand?
could you understand?
could they understand?

V-ing form

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

Perfect

could I have understood?
could you have understood?
could she 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 she 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 she 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 she 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 she 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 she 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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