can overturn
Regular verb: overturn - overturned- overturned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can overturn
you can overturn
she can overturn
we can overturn
you can overturn
they can overturn 	I can be overturning
you can be overturning
she can be overturning
we can be overturning
you can be overturning
they can be overturning	I can have overturned
you can have overturned
she can have overturned
we can have overturned
you can have overturned
they can have overturned	I can have been overturning
you can have been overturning
she can have been overturning
we can have been overturning
you can have been overturning
they can have been overturning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't overturn
you can't overturn
she can't overturn
we can't overturn
you can't overturn
they can't overturn 	I can't be overturning
you can't be overturning
she can't be overturning
we can't be overturning
you can't be overturning
they can't be overturning	I can't have overturned
you can't have overturned
she can't have overturned
we can't have overturned
you can't have overturned
they can't have overturned	I can't have been overturning
you can't have been overturning
she can't have been overturning
we can't have been overturning
you can't have been overturning
they can't have been overturning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I overturn?
can you overturn?
can she overturn?
can we overturn?
can you overturn?
can they overturn? 	can I be overturning?
can you be overturning?
can she be overturning?
can we be overturning?
can you be overturning?
can they be overturning? 	can I have overturned?
can you have overturned?
can she have overturned?
can we have overturned?
can you have overturned?
can they have overturned? 	can I have been overturning?
can you have been overturning?
can she have been overturning?
can we have been overturning?
can you have been overturning?
can they have been overturning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I overturn?
can't you overturn?
can't she overturn?
can't we overturn?
can't you overturn?
can't they overturn? 	can't I be overturning?
can't you be overturning?
can't she be overturning?
can't we be overturning?
can't you be overturning?
can't they be overturning? 	can't I have overturned?
can't you have overturned?
can't she have overturned?
can't we have overturned?
can't you have overturned?
can't they have overturned? 	can't I have been overturning?
can't you have been overturning?
can't she have been overturning?
can't we have been overturning?
can't you have been overturning?
can't they have been overturning?