English verb conjugation
SHOULD TOUGH

Regular verb: tough - toughed - toughed

Affirmation

Simple form	V-ing form
I should tough you should tough he should tough we should tough you should tough they should tough	I should be toughing you should be toughing he should be toughing we should be toughing you should be toughing they should be toughing
Perfect	V-ing perfect
I should have toughed you should have toughed he should have toughed we should have toughed you should have toughed they should have toughed	I should have been toughing you should have been toughing he should have been toughing we should have been toughing you should have been toughing they should have been toughing

Negation

Simple form	V-ing form
I should not tough you should not tough he should not tough we should not tough you should not tough they should not tough	I should not be toughing you should not be toughing he should not be toughing we should not be toughing you should not be toughing they should not be toughing
Perfect	V-ing perfect
I should not have toughed you should not have toughed he should not have toughed we should not have toughed you should not have toughed they should not have toughed	I should not have been toughing you should not have been toughing he should not have been toughing we should not have been toughing you should not have been toughing they should not have been toughing

Interrogative form

Simple form	V-ing form
should I tough? should you tough? should he tough? should we tough? should you tough? should they tough?	should I be toughing? should you be toughing? should he be toughing? should we be toughing? should you be toughing? should they be toughing?
Perfect	V-ing perfect
should I have toughed? should you have toughed? should he have toughed? should we have toughed? should you have toughed? should they have toughed?	should I have been toughing? should you have been toughing? should he have been toughing? should we have been toughing? should you have been toughing? should they have been toughing?

Interro-negative form

Simple form	V-ing form
should I not tough? should you not tough? should he not tough? should we not tough? should you not tough? should they not tough?	should I not be toughing? should you not be toughing? should he not be toughing? should we not be toughing? should you not be toughing? should they not be toughing?
Perfect	V-ing perfect
should I not have toughed? should you not have toughed? should he not have toughed? should we not have toughed? should you not have toughed? should they not have toughed?	should I not have been toughing? should you not have been toughing? should he not have been toughing? should we not have been toughing? should you not have been toughing? should they not have been toughing?