English verb conjugation
CAN CLASSIFY

Regular verb: classify - classified - classified

Affirmation

Simple form	V-ing form
I can classify you can classify she can classify we can classify you can classify they can classify	I can be classifying you can be classifying she can be classifying we can be classifying you can be classifying they can be classifying
Perfect	V-ing perfect
I can have classified you can have classified she can have classified we can have classified you can have classified they can have classified	I can have been classifying you can have been classifying she can have been classifying we can have been classifying you can have been classifying they can have been classifying

Negation

Simple form	V-ing form
I can't classify you can't classify she can't classify we can't classify you can't classify they can't classify	I can't be classifying you can't be classifying she can't be classifying we can't be classifying you can't be classifying they can't be classifying
Perfect	V-ing perfect
I can't have classified you can't have classified she can't have classified we can't have classified you can't have classified they can't have classified	I can't have been classifying you can't have been classifying she can't have been classifying we can't have been classifying you can't have been classifying they can't have been classifying

Interrogative form

Simple form	V-ing form
can I classify? can you classify? can she classify? can we classify? can you classify? can they classify?	can I be classifying? can you be classifying? can she be classifying? can we be classifying? can you be classifying? can they be classifying?
Perfect	V-ing perfect
can I have classified? can you have classified? can she have classified? can we have classified? can you have classified? can they have classified?	can I have been classifying? can you have been classifying? can she have been classifying? can we have been classifying? can you have been classifying? can they have been classifying?

Interro-negative form

Simple form	V-ing form
can't I classify? can't you classify? can't she classify? can't we classify? can't you classify? can't they classify?	can't I be classifying? can't you be classifying? can't she be classifying? can't we be classifying? can't you be classifying? can't they be classifying?
Perfect	V-ing perfect
can't I have classified? can't you have classified? can't she have classified? can't we have classified? can't you have classified? can't they have classified?	can't I have been classifying? can't you have been classifying? can't she have been classifying? can't we have been classifying? can't you have been classifying? can't they have been classifying?