English verb conjugation COULD OSCILLATE

Regular verb: oscillate - oscillated - oscillated

Affirmation

Simple form

I could oscillate
you could oscillate
he could oscillate
we could oscillate
you could oscillate
they could oscillate

V-ing form

I could be oscillating
you could be oscillating
he could be oscillating
we could be oscillating
you could be oscillating
they could be oscillating

Perfect

I could have oscillated
you could have oscillated
he could have oscillated
we could have oscillated
you could have oscillated
they could have oscillated

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I oscillate?
could you oscillate?
could he oscillate?
could we oscillate?
could you oscillate?
could they oscillate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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