English verb conjugation COULD THANK

Regular verb: thank - thanked - thanked

Affirmation

Simple form

I could thank
you could thank
he could thank
we could thank
you could thank
they could thank

V-ing form

I could be thanking
you could be thanking
he could be thanking
we could be thanking
you could be thanking
they could be thanking

Perfect

I could have thanked
you could have thanked
he could have thanked
we could have thanked
you could have thanked
they could have thanked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I thank?
could you thank?
could he thank?
could we thank?
could you thank?
could they thank?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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