I can soundproof you can soundproof she can soundproof we can soundproof you can soundproof they can soundproof
V-ing form
I can be soundproofing you can be soundproofing she can be soundproofing we can be soundproofing you can be soundproofing they can be soundproofing
Perfect
I can have soundproofed you can have soundproofed she can have soundproofed we can have soundproofed you can have soundproofed they can have soundproofed
V-ing perfect
I can have been soundproofing you can have been soundproofing she can have been soundproofing we can have been soundproofing you can have been soundproofing they can have been soundproofing
Negation
Simple form
I cannot soundproof you cannot soundproof she cannot soundproof we cannot soundproof you cannot soundproof they cannot soundproof
V-ing form
I cannot be soundproofing you cannot be soundproofing she cannot be soundproofing we cannot be soundproofing you cannot be soundproofing they cannot be soundproofing
Perfect
I cannot have soundproofed you cannot have soundproofed she cannot have soundproofed we cannot have soundproofed you cannot have soundproofed they cannot have soundproofed
V-ing perfect
I cannot have been soundproofing you cannot have been soundproofing she cannot have been soundproofing we cannot have been soundproofing you cannot have been soundproofing they cannot have been soundproofing
Interrogative form
Simple form
can I soundproof? can you soundproof? can she soundproof? can we soundproof? can you soundproof? can they soundproof?
V-ing form
can I be soundproofing? can you be soundproofing? can she be soundproofing? can we be soundproofing? can you be soundproofing? can they be soundproofing?
Perfect
can I have soundproofed? can you have soundproofed? can she have soundproofed? can we have soundproofed? can you have soundproofed? can they have soundproofed?
V-ing perfect
can I have been soundproofing? can you have been soundproofing? can she have been soundproofing? can we have been soundproofing? can you have been soundproofing? can they have been soundproofing?
Interro-negative form
Simple form
can I not soundproof? can you not soundproof? can she not soundproof? can we not soundproof? can you not soundproof? can they not soundproof?
V-ing form
can I not be soundproofing? can you not be soundproofing? can she not be soundproofing? can we not be soundproofing? can you not be soundproofing? can they not be soundproofing?
Perfect
can I not have soundproofed? can you not have soundproofed? can she not have soundproofed? can we not have soundproofed? can you not have soundproofed? can they not have soundproofed?
V-ing perfect
can I not have been soundproofing? can you not have been soundproofing? can she not have been soundproofing? can we not have been soundproofing? can you not have been soundproofing? can they not have been soundproofing?