English verb conjugation
CAN UNDERSCORE

Regular verb: underscore - underscored - underscored

Affirmation

Simple form	V-ing form
I can underscore you can underscore he can underscore we can underscore you can underscore they can underscore	I can be underscoring you can be underscoring he can be underscoring we can be underscoring you can be underscoring they can be underscoring
Perfect	V-ing perfect
I can have underscored you can have underscored he can have underscored we can have underscored you can have underscored they can have underscored	I can have been underscoring you can have been underscoring he can have been underscoring we can have been underscoring you can have been underscoring they can have been underscoring

Negation

Simple form	V-ing form
I can't underscore you can't underscore he can't underscore we can't underscore you can't underscore they can't underscore	I can't be underscoring you can't be underscoring he can't be underscoring we can't be underscoring you can't be underscoring they can't be underscoring
Perfect	V-ing perfect
I can't have underscored you can't have underscored he can't have underscored we can't have underscored you can't have underscored they can't have underscored	I can't have been underscoring you can't have been underscoring he can't have been underscoring we can't have been underscoring you can't have been underscoring they can't have been underscoring

Interrogative form

Simple form	V-ing form
can I underscore? can you underscore? can he underscore? can we underscore? can you underscore? can they underscore?	can I be underscoring? can you be underscoring? can he be underscoring? can we be underscoring? can you be underscoring? can they be underscoring?
Perfect	V-ing perfect
can I have underscored? can you have underscored? can he have underscored? can we have underscored? can you have underscored? can they have underscored?	can I have been underscoring? can you have been underscoring? can he have been underscoring? can we have been underscoring? can you have been underscoring? can they have been underscoring?

Interro-negative form

Simple form	V-ing form
can't I underscore? can't you underscore? can't he underscore? can't we underscore? can't you underscore? can't they underscore?	can't I be underscoring? can't you be underscoring? can't he be underscoring? can't we be underscoring? can't you be underscoring? can't they be underscoring?
Perfect	V-ing perfect
can't I have underscored? can't you have underscored? can't he have underscored? can't we have underscored? can't you have underscored? can't they have underscored?	can't I have been underscoring? can't you have been underscoring? can't he have been underscoring? can't we have been underscoring? can't you have been underscoring? can't they have been underscoring?