English verb conjugation COULD CONGRATULATE

Regular verb: congratulate - congratulated - congratulated

Affirmation

Simple form

I could congratulate
you could congratulate
he could congratulate
we could congratulate
you could congratulate
they could congratulate

V-ing form

I could be congratulating
you could be congratulating
he could be congratulating
we could be congratulating
you could be congratulating
they could be congratulating

Perfect

I could have congratulated
you could have congratulated
he could have congratulated
we could have congratulated
you could have congratulated
they could have congratulated

V-ing perfect

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

Negation

Simple form

I couldn't congratulate
you couldn't congratulate
he couldn't congratulate
we couldn't congratulate
you couldn't congratulate
they couldn't congratulate

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I congratulate?
could you congratulate?
could he congratulate?
could we congratulate?
could you congratulate?
could they congratulate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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