English verb conjugation
COULD UNSTRAP

Regular verb: unstrap - unstrapped - unstrapped

Affirmation

Simple form	V-ing form
I could unstrap you could unstrap she could unstrap we could unstrap you could unstrap they could unstrap	I could be unstrapping you could be unstrapping she could be unstrapping we could be unstrapping you could be unstrapping they could be unstrapping
Perfect	V-ing perfect
I could have unstrapped you could have unstrapped she could have unstrapped we could have unstrapped you could have unstrapped they could have unstrapped	I could have been unstrapping you could have been unstrapping she could have been unstrapping we could have been unstrapping you could have been unstrapping they could have been unstrapping

Negation

Simple form	V-ing form
I could not unstrap you could not unstrap she could not unstrap we could not unstrap you could not unstrap they could not unstrap	I could not be unstrapping you could not be unstrapping she could not be unstrapping we could not be unstrapping you could not be unstrapping they could not be unstrapping
Perfect	V-ing perfect
I could not have unstrapped you could not have unstrapped she could not have unstrapped we could not have unstrapped you could not have unstrapped they could not have unstrapped	I could not have been unstrapping you could not have been unstrapping she could not have been unstrapping we could not have been unstrapping you could not have been unstrapping they could not have been unstrapping

Interrogative form

Simple form	V-ing form
could I unstrap? could you unstrap? could she unstrap? could we unstrap? could you unstrap? could they unstrap?	could I be unstrapping? could you be unstrapping? could she be unstrapping? could we be unstrapping? could you be unstrapping? could they be unstrapping?
Perfect	V-ing perfect
could I have unstrapped? could you have unstrapped? could she have unstrapped? could we have unstrapped? could you have unstrapped? could they have unstrapped?	could I have been unstrapping? could you have been unstrapping? could she have been unstrapping? could we have been unstrapping? could you have been unstrapping? could they have been unstrapping?

Interro-negative form

Simple form	V-ing form
could I not unstrap? could you not unstrap? could she not unstrap? could we not unstrap? could you not unstrap? could they not unstrap?	could I not be unstrapping? could you not be unstrapping? could she not be unstrapping? could we not be unstrapping? could you not be unstrapping? could they not be unstrapping?
Perfect	V-ing perfect
could I not have unstrapped? could you not have unstrapped? could she not have unstrapped? could we not have unstrapped? could you not have unstrapped? could they not have unstrapped?	could I not have been unstrapping? could you not have been unstrapping? could she not have been unstrapping? could we not have been unstrapping? could you not have been unstrapping? could they not have been unstrapping?