can string
Irregular verb: string - strung- strung

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can string
you can string
she can string
we can string
you can string
they can string 	I can be stringing
you can be stringing
she can be stringing
we can be stringing
you can be stringing
they can be stringing	I can have strung
you can have strung
she can have strung
we can have strung
you can have strung
they can have strung	I can have been stringing
you can have been stringing
she can have been stringing
we can have been stringing
you can have been stringing
they can have been stringing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot string
you cannot string
she cannot string
we cannot string
you cannot string
they cannot string 	I cannot be stringing
you cannot be stringing
she cannot be stringing
we cannot be stringing
you cannot be stringing
they cannot be stringing	I cannot have strung
you cannot have strung
she cannot have strung
we cannot have strung
you cannot have strung
they cannot have strung	I cannot have been stringing
you cannot have been stringing
she cannot have been stringing
we cannot have been stringing
you cannot have been stringing
they cannot have been stringing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I string?
can you string?
can she string?
can we string?
can you string?
can they string? 	can I be stringing?
can you be stringing?
can she be stringing?
can we be stringing?
can you be stringing?
can they be stringing? 	can I have strung?
can you have strung?
can she have strung?
can we have strung?
can you have strung?
can they have strung? 	can I have been stringing?
can you have been stringing?
can she have been stringing?
can we have been stringing?
can you have been stringing?
can they have been stringing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not string?
can you not string?
can she not string?
can we not string?
can you not string?
can they not string? 	can I not be stringing?
can you not be stringing?
can she not be stringing?
can we not be stringing?
can you not be stringing?
can they not be stringing? 	can I not have strung?
can you not have strung?
can she not have strung?
can we not have strung?
can you not have strung?
can they not have strung? 	can I not have been stringing?
can you not have been stringing?
can she not have been stringing?
can we not have been stringing?
can you not have been stringing?
can they not have been stringing?