English verb conjugation COULD TOUGH

Regular verb: tough - toughed - toughed

Affirmation

Simple form

I could tough
you could tough
she could tough
we could tough
you could tough
they could tough

V-ing form

I could be toughing
you could be toughing
she could be toughing
we could be toughing
you could be toughing
they could be toughing

Perfect

I could have toughed
you could have toughed
she could have toughed
we could have toughed
you could have toughed
they could have toughed

V-ing perfect

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

Negation

Simple form

I could not tough
you could not tough
she could not tough
we could not tough
you could not tough
they could not tough

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I tough?
could you tough?
could she tough?
could we tough?
could you tough?
could they tough?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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