English verb conjugation COULD TOUGH

Regular verb: tough - toughed - toughed

Affirmation

Simple form

I could tough
you could tough
he could tough
we could tough
you could tough
they could tough

V-ing form

I could be toughing
you could be toughing
he could be toughing
we could be toughing
you could be toughing
they could be toughing

Perfect

I could have toughed
you could have toughed
he 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
he 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
he 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
he 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
he 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
he 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 he tough?
could we tough?
could you tough?
could they tough?

V-ing form

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

Perfect

could I have toughed?
could you have toughed?
could he 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 he 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 he 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 he 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 he 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 he 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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