can optimise
Regular verb: optimise - optimised- optimised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can optimise
you can optimise
he can optimise
we can optimise
you can optimise
they can optimise 	I can be optimising
you can be optimising
he can be optimising
we can be optimising
you can be optimising
they can be optimising	I can have optimised
you can have optimised
he can have optimised
we can have optimised
you can have optimised
they can have optimised	I can have been optimising
you can have been optimising
he can have been optimising
we can have been optimising
you can have been optimising
they can have been optimising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot optimise
you cannot optimise
he cannot optimise
we cannot optimise
you cannot optimise
they cannot optimise 	I cannot be optimising
you cannot be optimising
he cannot be optimising
we cannot be optimising
you cannot be optimising
they cannot be optimising	I cannot have optimised
you cannot have optimised
he cannot have optimised
we cannot have optimised
you cannot have optimised
they cannot have optimised	I cannot have been optimising
you cannot have been optimising
he cannot have been optimising
we cannot have been optimising
you cannot have been optimising
they cannot have been optimising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I optimise?
can you optimise?
can he optimise?
can we optimise?
can you optimise?
can they optimise? 	can I be optimising?
can you be optimising?
can he be optimising?
can we be optimising?
can you be optimising?
can they be optimising? 	can I have optimised?
can you have optimised?
can he have optimised?
can we have optimised?
can you have optimised?
can they have optimised? 	can I have been optimising?
can you have been optimising?
can he have been optimising?
can we have been optimising?
can you have been optimising?
can they have been optimising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not optimise?
can you not optimise?
can he not optimise?
can we not optimise?
can you not optimise?
can they not optimise? 	can I not be optimising?
can you not be optimising?
can he not be optimising?
can we not be optimising?
can you not be optimising?
can they not be optimising? 	can I not have optimised?
can you not have optimised?
can he not have optimised?
can we not have optimised?
can you not have optimised?
can they not have optimised? 	can I not have been optimising?
can you not have been optimising?
can he not have been optimising?
can we not have been optimising?
can you not have been optimising?
can they not have been optimising?