English verb conjugation
CAN FORTIFY

Regular verb: fortify - fortified - fortified

Affirmation

Simple form	V-ing form
I can fortify you can fortify he can fortify we can fortify you can fortify they can fortify	I can be fortifying you can be fortifying he can be fortifying we can be fortifying you can be fortifying they can be fortifying
Perfect	V-ing perfect
I can have fortified you can have fortified he can have fortified we can have fortified you can have fortified they can have fortified	I can have been fortifying you can have been fortifying he can have been fortifying we can have been fortifying you can have been fortifying they can have been fortifying

Negation

Simple form	V-ing form
I can't fortify you can't fortify he can't fortify we can't fortify you can't fortify they can't fortify	I can't be fortifying you can't be fortifying he can't be fortifying we can't be fortifying you can't be fortifying they can't be fortifying
Perfect	V-ing perfect
I can't have fortified you can't have fortified he can't have fortified we can't have fortified you can't have fortified they can't have fortified	I can't have been fortifying you can't have been fortifying he can't have been fortifying we can't have been fortifying you can't have been fortifying they can't have been fortifying

Interrogative form

Simple form	V-ing form
can I fortify? can you fortify? can he fortify? can we fortify? can you fortify? can they fortify?	can I be fortifying? can you be fortifying? can he be fortifying? can we be fortifying? can you be fortifying? can they be fortifying?
Perfect	V-ing perfect
can I have fortified? can you have fortified? can he have fortified? can we have fortified? can you have fortified? can they have fortified?	can I have been fortifying? can you have been fortifying? can he have been fortifying? can we have been fortifying? can you have been fortifying? can they have been fortifying?

Interro-negative form

Simple form	V-ing form
can't I fortify? can't you fortify? can't he fortify? can't we fortify? can't you fortify? can't they fortify?	can't I be fortifying? can't you be fortifying? can't he be fortifying? can't we be fortifying? can't you be fortifying? can't they be fortifying?
Perfect	V-ing perfect
can't I have fortified? can't you have fortified? can't he have fortified? can't we have fortified? can't you have fortified? can't they have fortified?	can't I have been fortifying? can't you have been fortifying? can't he have been fortifying? can't we have been fortifying? can't you have been fortifying? can't they have been fortifying?