can invent
Regular verb: invent - invented- invented

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can invent
you can invent
she can invent
we can invent
you can invent
they can invent 	I can be inventing
you can be inventing
she can be inventing
we can be inventing
you can be inventing
they can be inventing	I can have invented
you can have invented
she can have invented
we can have invented
you can have invented
they can have invented	I can have been inventing
you can have been inventing
she can have been inventing
we can have been inventing
you can have been inventing
they can have been inventing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot invent
you cannot invent
she cannot invent
we cannot invent
you cannot invent
they cannot invent 	I cannot be inventing
you cannot be inventing
she cannot be inventing
we cannot be inventing
you cannot be inventing
they cannot be inventing	I cannot have invented
you cannot have invented
she cannot have invented
we cannot have invented
you cannot have invented
they cannot have invented	I cannot have been inventing
you cannot have been inventing
she cannot have been inventing
we cannot have been inventing
you cannot have been inventing
they cannot have been inventing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I invent?
can you invent?
can she invent?
can we invent?
can you invent?
can they invent? 	can I be inventing?
can you be inventing?
can she be inventing?
can we be inventing?
can you be inventing?
can they be inventing? 	can I have invented?
can you have invented?
can she have invented?
can we have invented?
can you have invented?
can they have invented? 	can I have been inventing?
can you have been inventing?
can she have been inventing?
can we have been inventing?
can you have been inventing?
can they have been inventing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not invent?
can you not invent?
can she not invent?
can we not invent?
can you not invent?
can they not invent? 	can I not be inventing?
can you not be inventing?
can she not be inventing?
can we not be inventing?
can you not be inventing?
can they not be inventing? 	can I not have invented?
can you not have invented?
can she not have invented?
can we not have invented?
can you not have invented?
can they not have invented? 	can I not have been inventing?
can you not have been inventing?
can she not have been inventing?
can we not have been inventing?
can you not have been inventing?
can they not have been inventing?