I can strap you can strap she can strap we can strap you can strap they can strap
V-ing form
I can be strapping you can be strapping she can be strapping we can be strapping you can be strapping they can be strapping
Perfect
I can have strapped you can have strapped she can have strapped we can have strapped you can have strapped they can have strapped
V-ing perfect
I can have been strapping you can have been strapping she can have been strapping we can have been strapping you can have been strapping they can have been strapping
Negation
Simple form
I cannot strap you cannot strap she cannot strap we cannot strap you cannot strap they cannot strap
V-ing form
I cannot be strapping you cannot be strapping she cannot be strapping we cannot be strapping you cannot be strapping they cannot be strapping
Perfect
I cannot have strapped you cannot have strapped she cannot have strapped we cannot have strapped you cannot have strapped they cannot have strapped
V-ing perfect
I cannot have been strapping you cannot have been strapping she cannot have been strapping we cannot have been strapping you cannot have been strapping they cannot have been strapping
Interrogative form
Simple form
can I strap? can you strap? can she strap? can we strap? can you strap? can they strap?
V-ing form
can I be strapping? can you be strapping? can she be strapping? can we be strapping? can you be strapping? can they be strapping?
Perfect
can I have strapped? can you have strapped? can she have strapped? can we have strapped? can you have strapped? can they have strapped?
V-ing perfect
can I have been strapping? can you have been strapping? can she have been strapping? can we have been strapping? can you have been strapping? can they have been strapping?
Interro-negative form
Simple form
can I not strap? can you not strap? can she not strap? can we not strap? can you not strap? can they not strap?
V-ing form
can I not be strapping? can you not be strapping? can she not be strapping? can we not be strapping? can you not be strapping? can they not be strapping?
Perfect
can I not have strapped? can you not have strapped? can she not have strapped? can we not have strapped? can you not have strapped? can they not have strapped?
V-ing perfect
can I not have been strapping? can you not have been strapping? can she not have been strapping? can we not have been strapping? can you not have been strapping? can they not have been strapping?