can exsert
Regular verb: exsert - exserted- exserted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can exsert
you can exsert
he can exsert
we can exsert
you can exsert
they can exsert 	I can be exserting
you can be exserting
he can be exserting
we can be exserting
you can be exserting
they can be exserting	I can have exserted
you can have exserted
he can have exserted
we can have exserted
you can have exserted
they can have exserted	I can have been exserting
you can have been exserting
he can have been exserting
we can have been exserting
you can have been exserting
they can have been exserting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot exsert
you cannot exsert
he cannot exsert
we cannot exsert
you cannot exsert
they cannot exsert 	I cannot be exserting
you cannot be exserting
he cannot be exserting
we cannot be exserting
you cannot be exserting
they cannot be exserting	I cannot have exserted
you cannot have exserted
he cannot have exserted
we cannot have exserted
you cannot have exserted
they cannot have exserted	I cannot have been exserting
you cannot have been exserting
he cannot have been exserting
we cannot have been exserting
you cannot have been exserting
they cannot have been exserting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I exsert?
can you exsert?
can he exsert?
can we exsert?
can you exsert?
can they exsert? 	can I be exserting?
can you be exserting?
can he be exserting?
can we be exserting?
can you be exserting?
can they be exserting? 	can I have exserted?
can you have exserted?
can he have exserted?
can we have exserted?
can you have exserted?
can they have exserted? 	can I have been exserting?
can you have been exserting?
can he have been exserting?
can we have been exserting?
can you have been exserting?
can they have been exserting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not exsert?
can you not exsert?
can he not exsert?
can we not exsert?
can you not exsert?
can they not exsert? 	can I not be exserting?
can you not be exserting?
can he not be exserting?
can we not be exserting?
can you not be exserting?
can they not be exserting? 	can I not have exserted?
can you not have exserted?
can he not have exserted?
can we not have exserted?
can you not have exserted?
can they not have exserted? 	can I not have been exserting?
can you not have been exserting?
can he not have been exserting?
can we not have been exserting?
can you not have been exserting?
can they not have been exserting?