can scan
Regular verb: scan - scanned- scanned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can scan
you can scan
he can scan
we can scan
you can scan
they can scan 	I can be scanning
you can be scanning
he can be scanning
we can be scanning
you can be scanning
they can be scanning	I can have scanned
you can have scanned
he can have scanned
we can have scanned
you can have scanned
they can have scanned	I can have been scanning
you can have been scanning
he can have been scanning
we can have been scanning
you can have been scanning
they can have been scanning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't scan
you can't scan
he can't scan
we can't scan
you can't scan
they can't scan 	I can't be scanning
you can't be scanning
he can't be scanning
we can't be scanning
you can't be scanning
they can't be scanning	I can't have scanned
you can't have scanned
he can't have scanned
we can't have scanned
you can't have scanned
they can't have scanned	I can't have been scanning
you can't have been scanning
he can't have been scanning
we can't have been scanning
you can't have been scanning
they can't have been scanning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I scan?
can you scan?
can he scan?
can we scan?
can you scan?
can they scan? 	can I be scanning?
can you be scanning?
can he be scanning?
can we be scanning?
can you be scanning?
can they be scanning? 	can I have scanned?
can you have scanned?
can he have scanned?
can we have scanned?
can you have scanned?
can they have scanned? 	can I have been scanning?
can you have been scanning?
can he have been scanning?
can we have been scanning?
can you have been scanning?
can they have been scanning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I scan?
can't you scan?
can't he scan?
can't we scan?
can't you scan?
can't they scan? 	can't I be scanning?
can't you be scanning?
can't he be scanning?
can't we be scanning?
can't you be scanning?
can't they be scanning? 	can't I have scanned?
can't you have scanned?
can't he have scanned?
can't we have scanned?
can't you have scanned?
can't they have scanned? 	can't I have been scanning?
can't you have been scanning?
can't he have been scanning?
can't we have been scanning?
can't you have been scanning?
can't they have been scanning?