can block
Regular verb: block - blocked- blocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can block
you can block
she can block
we can block
you can block
they can block 	I can be blocking
you can be blocking
she can be blocking
we can be blocking
you can be blocking
they can be blocking	I can have blocked
you can have blocked
she can have blocked
we can have blocked
you can have blocked
they can have blocked	I can have been blocking
you can have been blocking
she can have been blocking
we can have been blocking
you can have been blocking
they can have been blocking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't block
you can't block
she can't block
we can't block
you can't block
they can't block 	I can't be blocking
you can't be blocking
she can't be blocking
we can't be blocking
you can't be blocking
they can't be blocking	I can't have blocked
you can't have blocked
she can't have blocked
we can't have blocked
you can't have blocked
they can't have blocked	I can't have been blocking
you can't have been blocking
she can't have been blocking
we can't have been blocking
you can't have been blocking
they can't have been blocking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I block?
can you block?
can she block?
can we block?
can you block?
can they block? 	can I be blocking?
can you be blocking?
can she be blocking?
can we be blocking?
can you be blocking?
can they be blocking? 	can I have blocked?
can you have blocked?
can she have blocked?
can we have blocked?
can you have blocked?
can they have blocked? 	can I have been blocking?
can you have been blocking?
can she have been blocking?
can we have been blocking?
can you have been blocking?
can they have been blocking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I block?
can't you block?
can't she block?
can't we block?
can't you block?
can't they block? 	can't I be blocking?
can't you be blocking?
can't she be blocking?
can't we be blocking?
can't you be blocking?
can't they be blocking? 	can't I have blocked?
can't you have blocked?
can't she have blocked?
can't we have blocked?
can't you have blocked?
can't they have blocked? 	can't I have been blocking?
can't you have been blocking?
can't she have been blocking?
can't we have been blocking?
can't you have been blocking?
can't they have been blocking?