can specialise
Regular verb: specialise - specialised- specialised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can specialise
you can specialise
he can specialise
we can specialise
you can specialise
they can specialise 	I can be specialising
you can be specialising
he can be specialising
we can be specialising
you can be specialising
they can be specialising	I can have specialised
you can have specialised
he can have specialised
we can have specialised
you can have specialised
they can have specialised	I can have been specialising
you can have been specialising
he can have been specialising
we can have been specialising
you can have been specialising
they can have been specialising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't specialise
you can't specialise
he can't specialise
we can't specialise
you can't specialise
they can't specialise 	I can't be specialising
you can't be specialising
he can't be specialising
we can't be specialising
you can't be specialising
they can't be specialising	I can't have specialised
you can't have specialised
he can't have specialised
we can't have specialised
you can't have specialised
they can't have specialised	I can't have been specialising
you can't have been specialising
he can't have been specialising
we can't have been specialising
you can't have been specialising
they can't have been specialising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I specialise?
can you specialise?
can he specialise?
can we specialise?
can you specialise?
can they specialise? 	can I be specialising?
can you be specialising?
can he be specialising?
can we be specialising?
can you be specialising?
can they be specialising? 	can I have specialised?
can you have specialised?
can he have specialised?
can we have specialised?
can you have specialised?
can they have specialised? 	can I have been specialising?
can you have been specialising?
can he have been specialising?
can we have been specialising?
can you have been specialising?
can they have been specialising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I specialise?
can't you specialise?
can't he specialise?
can't we specialise?
can't you specialise?
can't they specialise? 	can't I be specialising?
can't you be specialising?
can't he be specialising?
can't we be specialising?
can't you be specialising?
can't they be specialising? 	can't I have specialised?
can't you have specialised?
can't he have specialised?
can't we have specialised?
can't you have specialised?
can't they have specialised? 	can't I have been specialising?
can't you have been specialising?
can't he have been specialising?
can't we have been specialising?
can't you have been specialising?
can't they have been specialising?