English verb conjugation COULD PERCOLATE

Regular verb: percolate - percolated - percolated

Affirmation

Simple form

I could percolate
you could percolate
he could percolate
we could percolate
you could percolate
they could percolate

V-ing form

I could be percolating
you could be percolating
he could be percolating
we could be percolating
you could be percolating
they could be percolating

Perfect

I could have percolated
you could have percolated
he could have percolated
we could have percolated
you could have percolated
they could have percolated

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I percolate?
could you percolate?
could he percolate?
could we percolate?
could you percolate?
could they percolate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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