can parenthesise
Regular verb: parenthesise - parenthesised- parenthesised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can parenthesise
you can parenthesise
he can parenthesise
we can parenthesise
you can parenthesise
they can parenthesise 	I can be parenthesising
you can be parenthesising
he can be parenthesising
we can be parenthesising
you can be parenthesising
they can be parenthesising	I can have parenthesised
you can have parenthesised
he can have parenthesised
we can have parenthesised
you can have parenthesised
they can have parenthesised	I can have been parenthesising
you can have been parenthesising
he can have been parenthesising
we can have been parenthesising
you can have been parenthesising
they can have been parenthesising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't parenthesise
you can't parenthesise
he can't parenthesise
we can't parenthesise
you can't parenthesise
they can't parenthesise 	I can't be parenthesising
you can't be parenthesising
he can't be parenthesising
we can't be parenthesising
you can't be parenthesising
they can't be parenthesising	I can't have parenthesised
you can't have parenthesised
he can't have parenthesised
we can't have parenthesised
you can't have parenthesised
they can't have parenthesised	I can't have been parenthesising
you can't have been parenthesising
he can't have been parenthesising
we can't have been parenthesising
you can't have been parenthesising
they can't have been parenthesising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I parenthesise?
can you parenthesise?
can he parenthesise?
can we parenthesise?
can you parenthesise?
can they parenthesise? 	can I be parenthesising?
can you be parenthesising?
can he be parenthesising?
can we be parenthesising?
can you be parenthesising?
can they be parenthesising? 	can I have parenthesised?
can you have parenthesised?
can he have parenthesised?
can we have parenthesised?
can you have parenthesised?
can they have parenthesised? 	can I have been parenthesising?
can you have been parenthesising?
can he have been parenthesising?
can we have been parenthesising?
can you have been parenthesising?
can they have been parenthesising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I parenthesise?
can't you parenthesise?
can't he parenthesise?
can't we parenthesise?
can't you parenthesise?
can't they parenthesise? 	can't I be parenthesising?
can't you be parenthesising?
can't he be parenthesising?
can't we be parenthesising?
can't you be parenthesising?
can't they be parenthesising? 	can't I have parenthesised?
can't you have parenthesised?
can't he have parenthesised?
can't we have parenthesised?
can't you have parenthesised?
can't they have parenthesised? 	can't I have been parenthesising?
can't you have been parenthesising?
can't he have been parenthesising?
can't we have been parenthesising?
can't you have been parenthesising?
can't they have been parenthesising?