English verb conjugation COULD OPERATE

Regular verb: operate - operated - operated

Affirmation

Simple form

I could operate
you could operate
she could operate
we could operate
you could operate
they could operate

V-ing form

I could be operating
you could be operating
she could be operating
we could be operating
you could be operating
they could be operating

Perfect

I could have operated
you could have operated
she could have operated
we could have operated
you could have operated
they could have operated

V-ing perfect

I could have been operating
you could have been operating
she could have been operating
we could have been operating
you could have been operating
they could have been operating

Negation

Simple form

I couldn't operate
you couldn't operate
she couldn't operate
we couldn't operate
you couldn't operate
they couldn't operate

V-ing form

I couldn't be operating
you couldn't be operating
she couldn't be operating
we couldn't be operating
you couldn't be operating
they couldn't be operating

Perfect

I couldn't have operated
you couldn't have operated
she couldn't have operated
we couldn't have operated
you couldn't have operated
they couldn't have operated

V-ing perfect

I couldn't have been operating
you couldn't have been operating
she couldn't have been operating
we couldn't have been operating
you couldn't have been operating
they couldn't have been operating

Interrogative form

Simple form

could I operate?
could you operate?
could she operate?
could we operate?
could you operate?
could they operate?

V-ing form

could I be operating?
could you be operating?
could she be operating?
could we be operating?
could you be operating?
could they be operating?

Perfect

could I have operated?
could you have operated?
could she have operated?
could we have operated?
could you have operated?
could they have operated?

V-ing perfect

could I have been operating?
could you have been operating?
could she have been operating?
could we have been operating?
could you have been operating?
could they have been operating?

Interro-negative form

Simple form

couldn't I operate?
couldn't you operate?
couldn't she operate?
couldn't we operate?
couldn't you operate?
couldn't they operate?

V-ing form

couldn't I be operating?
couldn't you be operating?
couldn't she be operating?
couldn't we be operating?
couldn't you be operating?
couldn't they be operating?

Perfect

couldn't I have operated?
couldn't you have operated?
couldn't she have operated?
couldn't we have operated?
couldn't you have operated?
couldn't they have operated?

V-ing perfect

couldn't I have been operating?
couldn't you have been operating?
couldn't she have been operating?
couldn't we have been operating?
couldn't you have been operating?
couldn't they have been operating?

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