I can justify you can justify she can justify we can justify you can justify they can justify
V-ing form
I can be justifying you can be justifying she can be justifying we can be justifying you can be justifying they can be justifying
Perfect
I can have justified you can have justified she can have justified we can have justified you can have justified they can have justified
V-ing perfect
I can have been justifying you can have been justifying she can have been justifying we can have been justifying you can have been justifying they can have been justifying
Negation
Simple form
I cannot justify you cannot justify she cannot justify we cannot justify you cannot justify they cannot justify
V-ing form
I cannot be justifying you cannot be justifying she cannot be justifying we cannot be justifying you cannot be justifying they cannot be justifying
Perfect
I cannot have justified you cannot have justified she cannot have justified we cannot have justified you cannot have justified they cannot have justified
V-ing perfect
I cannot have been justifying you cannot have been justifying she cannot have been justifying we cannot have been justifying you cannot have been justifying they cannot have been justifying
Interrogative form
Simple form
can I justify? can you justify? can she justify? can we justify? can you justify? can they justify?
V-ing form
can I be justifying? can you be justifying? can she be justifying? can we be justifying? can you be justifying? can they be justifying?
Perfect
can I have justified? can you have justified? can she have justified? can we have justified? can you have justified? can they have justified?
V-ing perfect
can I have been justifying? can you have been justifying? can she have been justifying? can we have been justifying? can you have been justifying? can they have been justifying?
Interro-negative form
Simple form
can I not justify? can you not justify? can she not justify? can we not justify? can you not justify? can they not justify?
V-ing form
can I not be justifying? can you not be justifying? can she not be justifying? can we not be justifying? can you not be justifying? can they not be justifying?
Perfect
can I not have justified? can you not have justified? can she not have justified? can we not have justified? can you not have justified? can they not have justified?
V-ing perfect
can I not have been justifying? can you not have been justifying? can she not have been justifying? can we not have been justifying? can you not have been justifying? can they not have been justifying?