English verb conjugation
CAN WATERPROOF

Regular verb: waterproof - waterproofed - waterproofed

Affirmation

Simple form	V-ing form
I can waterproof you can waterproof she can waterproof we can waterproof you can waterproof they can waterproof	I can be waterproofing you can be waterproofing she can be waterproofing we can be waterproofing you can be waterproofing they can be waterproofing
Perfect	V-ing perfect
I can have waterproofed you can have waterproofed she can have waterproofed we can have waterproofed you can have waterproofed they can have waterproofed	I can have been waterproofing you can have been waterproofing she can have been waterproofing we can have been waterproofing you can have been waterproofing they can have been waterproofing

Negation

Simple form	V-ing form
I cannot waterproof you cannot waterproof she cannot waterproof we cannot waterproof you cannot waterproof they cannot waterproof	I cannot be waterproofing you cannot be waterproofing she cannot be waterproofing we cannot be waterproofing you cannot be waterproofing they cannot be waterproofing
Perfect	V-ing perfect
I cannot have waterproofed you cannot have waterproofed she cannot have waterproofed we cannot have waterproofed you cannot have waterproofed they cannot have waterproofed	I cannot have been waterproofing you cannot have been waterproofing she cannot have been waterproofing we cannot have been waterproofing you cannot have been waterproofing they cannot have been waterproofing

Interrogative form

Simple form	V-ing form
can I waterproof? can you waterproof? can she waterproof? can we waterproof? can you waterproof? can they waterproof?	can I be waterproofing? can you be waterproofing? can she be waterproofing? can we be waterproofing? can you be waterproofing? can they be waterproofing?
Perfect	V-ing perfect
can I have waterproofed? can you have waterproofed? can she have waterproofed? can we have waterproofed? can you have waterproofed? can they have waterproofed?	can I have been waterproofing? can you have been waterproofing? can she have been waterproofing? can we have been waterproofing? can you have been waterproofing? can they have been waterproofing?

Interro-negative form

Simple form	V-ing form
can I not waterproof? can you not waterproof? can she not waterproof? can we not waterproof? can you not waterproof? can they not waterproof?	can I not be waterproofing? can you not be waterproofing? can she not be waterproofing? can we not be waterproofing? can you not be waterproofing? can they not be waterproofing?
Perfect	V-ing perfect
can I not have waterproofed? can you not have waterproofed? can she not have waterproofed? can we not have waterproofed? can you not have waterproofed? can they not have waterproofed?	can I not have been waterproofing? can you not have been waterproofing? can she not have been waterproofing? can we not have been waterproofing? can you not have been waterproofing? can they not have been waterproofing?