English verb conjugation
CAN SIGNIFY

Regular verb: signify - signified - signified

Affirmation

Simple form	V-ing form
I can signify you can signify she can signify we can signify you can signify they can signify	I can be signifying you can be signifying she can be signifying we can be signifying you can be signifying they can be signifying
Perfect	V-ing perfect
I can have signified you can have signified she can have signified we can have signified you can have signified they can have signified	I can have been signifying you can have been signifying she can have been signifying we can have been signifying you can have been signifying they can have been signifying

Negation

Simple form	V-ing form
I can't signify you can't signify she can't signify we can't signify you can't signify they can't signify	I can't be signifying you can't be signifying she can't be signifying we can't be signifying you can't be signifying they can't be signifying
Perfect	V-ing perfect
I can't have signified you can't have signified she can't have signified we can't have signified you can't have signified they can't have signified	I can't have been signifying you can't have been signifying she can't have been signifying we can't have been signifying you can't have been signifying they can't have been signifying

Interrogative form

Simple form	V-ing form
can I signify? can you signify? can she signify? can we signify? can you signify? can they signify?	can I be signifying? can you be signifying? can she be signifying? can we be signifying? can you be signifying? can they be signifying?
Perfect	V-ing perfect
can I have signified? can you have signified? can she have signified? can we have signified? can you have signified? can they have signified?	can I have been signifying? can you have been signifying? can she have been signifying? can we have been signifying? can you have been signifying? can they have been signifying?

Interro-negative form

Simple form	V-ing form
can't I signify? can't you signify? can't she signify? can't we signify? can't you signify? can't they signify?	can't I be signifying? can't you be signifying? can't she be signifying? can't we be signifying? can't you be signifying? can't they be signifying?
Perfect	V-ing perfect
can't I have signified? can't you have signified? can't she have signified? can't we have signified? can't you have signified? can't they have signified?	can't I have been signifying? can't you have been signifying? can't she have been signifying? can't we have been signifying? can't you have been signifying? can't they have been signifying?