can constringe
Regular verb: constringe - constringed- constringed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can constringe
you can constringe
he can constringe
we can constringe
you can constringe
they can constringe 	I can be constringing
you can be constringing
he can be constringing
we can be constringing
you can be constringing
they can be constringing	I can have constringed
you can have constringed
he can have constringed
we can have constringed
you can have constringed
they can have constringed	I can have been constringing
you can have been constringing
he can have been constringing
we can have been constringing
you can have been constringing
they can have been constringing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot constringe
you cannot constringe
he cannot constringe
we cannot constringe
you cannot constringe
they cannot constringe 	I cannot be constringing
you cannot be constringing
he cannot be constringing
we cannot be constringing
you cannot be constringing
they cannot be constringing	I cannot have constringed
you cannot have constringed
he cannot have constringed
we cannot have constringed
you cannot have constringed
they cannot have constringed	I cannot have been constringing
you cannot have been constringing
he cannot have been constringing
we cannot have been constringing
you cannot have been constringing
they cannot have been constringing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I constringe?
can you constringe?
can he constringe?
can we constringe?
can you constringe?
can they constringe? 	can I be constringing?
can you be constringing?
can he be constringing?
can we be constringing?
can you be constringing?
can they be constringing? 	can I have constringed?
can you have constringed?
can he have constringed?
can we have constringed?
can you have constringed?
can they have constringed? 	can I have been constringing?
can you have been constringing?
can he have been constringing?
can we have been constringing?
can you have been constringing?
can they have been constringing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not constringe?
can you not constringe?
can he not constringe?
can we not constringe?
can you not constringe?
can they not constringe? 	can I not be constringing?
can you not be constringing?
can he not be constringing?
can we not be constringing?
can you not be constringing?
can they not be constringing? 	can I not have constringed?
can you not have constringed?
can he not have constringed?
can we not have constringed?
can you not have constringed?
can they not have constringed? 	can I not have been constringing?
can you not have been constringing?
can he not have been constringing?
can we not have been constringing?
can you not have been constringing?
can they not have been constringing?