English verb conjugation
CAN WATERPROOF

Regular verb: waterproof - waterproofed - waterproofed

Affirmation

Simple form	V-ing form
I can waterproof you can waterproof he can waterproof we can waterproof you can waterproof they can waterproof	I can be waterproofing you can be waterproofing he 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 he 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 he 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 can't waterproof you can't waterproof he can't waterproof we can't waterproof you can't waterproof they can't waterproof	I can't be waterproofing you can't be waterproofing he can't be waterproofing we can't be waterproofing you can't be waterproofing they can't be waterproofing
Perfect	V-ing perfect
I can't have waterproofed you can't have waterproofed he can't have waterproofed we can't have waterproofed you can't have waterproofed they can't have waterproofed	I can't have been waterproofing you can't have been waterproofing he can't have been waterproofing we can't have been waterproofing you can't have been waterproofing they can't have been waterproofing

Interrogative form

Simple form	V-ing form
can I waterproof? can you waterproof? can he waterproof? can we waterproof? can you waterproof? can they waterproof?	can I be waterproofing? can you be waterproofing? can he 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 he 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 he 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't I waterproof? can't you waterproof? can't he waterproof? can't we waterproof? can't you waterproof? can't they waterproof?	can't I be waterproofing? can't you be waterproofing? can't he be waterproofing? can't we be waterproofing? can't you be waterproofing? can't they be waterproofing?
Perfect	V-ing perfect
can't I have waterproofed? can't you have waterproofed? can't he have waterproofed? can't we have waterproofed? can't you have waterproofed? can't they have waterproofed?	can't I have been waterproofing? can't you have been waterproofing? can't he have been waterproofing? can't we have been waterproofing? can't you have been waterproofing? can't they have been waterproofing?