English verb conjugation CAN UNDERSTAND

Irregular verb: understand - understood - understood

Affirmation

Simple form

I can understand
you can understand
he can understand
we can understand
you can understand
they can understand

V-ing form

I can be understanding
you can be understanding
he can be understanding
we can be understanding
you can be understanding
they can be understanding

Perfect

I can have understood
you can have understood
he can have understood
we can have understood
you can have understood
they can have understood

V-ing perfect

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

Negation

Simple form

I can't understand
you can't understand
he can't understand
we can't understand
you can't understand
they can't understand

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

can I understand?
can you understand?
can he understand?
can we understand?
can you understand?
can they understand?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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