English verb conjugation
COULD UNDERSCORE

Regular verb: underscore - underscored - underscored

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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