English verb conjugation COULD GRUMBLE

Regular verb: grumble - grumbled - grumbled

Affirmation

Simple form

I could grumble
you could grumble
he could grumble
we could grumble
you could grumble
they could grumble

V-ing form

I could be grumbling
you could be grumbling
he could be grumbling
we could be grumbling
you could be grumbling
they could be grumbling

Perfect

I could have grumbled
you could have grumbled
he could have grumbled
we could have grumbled
you could have grumbled
they could have grumbled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I grumble?
could you grumble?
could he grumble?
could we grumble?
could you grumble?
could they grumble?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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