English verb conjugation COULD TUBE

Regular verb: tube - tubed - tubed

Affirmation

Simple form

I could tube
you could tube
she could tube
we could tube
you could tube
they could tube

V-ing form

I could be tubing
you could be tubing
she could be tubing
we could be tubing
you could be tubing
they could be tubing

Perfect

I could have tubed
you could have tubed
she could have tubed
we could have tubed
you could have tubed
they could have tubed

V-ing perfect

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

Negation

Simple form

I could not tube
you could not tube
she could not tube
we could not tube
you could not tube
they could not tube

V-ing form

I could not be tubing
you could not be tubing
she could not be tubing
we could not be tubing
you could not be tubing
they could not be tubing

Perfect

I could not have tubed
you could not have tubed
she could not have tubed
we could not have tubed
you could not have tubed
they could not have tubed

V-ing perfect

I could not have been tubing
you could not have been tubing
she could not have been tubing
we could not have been tubing
you could not have been tubing
they could not have been tubing

Interrogative form

Simple form

could I tube?
could you tube?
could she tube?
could we tube?
could you tube?
could they tube?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not tube?
could you not tube?
could she not tube?
could we not tube?
could you not tube?
could they not tube?

V-ing form

could I not be tubing?
could you not be tubing?
could she not be tubing?
could we not be tubing?
could you not be tubing?
could they not be tubing?

Perfect

could I not have tubed?
could you not have tubed?
could she not have tubed?
could we not have tubed?
could you not have tubed?
could they not have tubed?

V-ing perfect

could I not have been tubing?
could you not have been tubing?
could she not have been tubing?
could we not have been tubing?
could you not have been tubing?
could they not have been tubing?

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