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 couldn't unstrap you couldn't unstrap she couldn't unstrap we couldn't unstrap you couldn't unstrap they couldn't unstrap	I couldn't be unstrapping you couldn't be unstrapping she couldn't be unstrapping we couldn't be unstrapping you couldn't be unstrapping they couldn't be unstrapping
Perfect	V-ing perfect
I couldn't have unstrapped you couldn't have unstrapped she couldn't have unstrapped we couldn't have unstrapped you couldn't have unstrapped they couldn't have unstrapped	I couldn't have been unstrapping you couldn't have been unstrapping she couldn't have been unstrapping we couldn't have been unstrapping you couldn't have been unstrapping they couldn't 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
couldn't I unstrap? couldn't you unstrap? couldn't she unstrap? couldn't we unstrap? couldn't you unstrap? couldn't they unstrap?	couldn't I be unstrapping? couldn't you be unstrapping? couldn't she be unstrapping? couldn't we be unstrapping? couldn't you be unstrapping? couldn't they be unstrapping?
Perfect	V-ing perfect
couldn't I have unstrapped? couldn't you have unstrapped? couldn't she have unstrapped? couldn't we have unstrapped? couldn't you have unstrapped? couldn't they have unstrapped?	couldn't I have been unstrapping? couldn't you have been unstrapping? couldn't she have been unstrapping? couldn't we have been unstrapping? couldn't you have been unstrapping? couldn't they have been unstrapping?