can unstring
Irregular verb: unstring - unstrung- unstrung

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can unstring
you can unstring
he can unstring
we can unstring
you can unstring
they can unstring 	I can be unstringing
you can be unstringing
he can be unstringing
we can be unstringing
you can be unstringing
they can be unstringing	I can have unstrung
you can have unstrung
he can have unstrung
we can have unstrung
you can have unstrung
they can have unstrung	I can have been unstringing
you can have been unstringing
he can have been unstringing
we can have been unstringing
you can have been unstringing
they can have been unstringing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't unstring
you can't unstring
he can't unstring
we can't unstring
you can't unstring
they can't unstring 	I can't be unstringing
you can't be unstringing
he can't be unstringing
we can't be unstringing
you can't be unstringing
they can't be unstringing	I can't have unstrung
you can't have unstrung
he can't have unstrung
we can't have unstrung
you can't have unstrung
they can't have unstrung	I can't have been unstringing
you can't have been unstringing
he can't have been unstringing
we can't have been unstringing
you can't have been unstringing
they can't have been unstringing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I unstring?
can you unstring?
can he unstring?
can we unstring?
can you unstring?
can they unstring? 	can I be unstringing?
can you be unstringing?
can he be unstringing?
can we be unstringing?
can you be unstringing?
can they be unstringing? 	can I have unstrung?
can you have unstrung?
can he have unstrung?
can we have unstrung?
can you have unstrung?
can they have unstrung? 	can I have been unstringing?
can you have been unstringing?
can he have been unstringing?
can we have been unstringing?
can you have been unstringing?
can they have been unstringing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I unstring?
can't you unstring?
can't he unstring?
can't we unstring?
can't you unstring?
can't they unstring? 	can't I be unstringing?
can't you be unstringing?
can't he be unstringing?
can't we be unstringing?
can't you be unstringing?
can't they be unstringing? 	can't I have unstrung?
can't you have unstrung?
can't he have unstrung?
can't we have unstrung?
can't you have unstrung?
can't they have unstrung? 	can't I have been unstringing?
can't you have been unstringing?
can't he have been unstringing?
can't we have been unstringing?
can't you have been unstringing?
can't they have been unstringing?