English verb conjugation
COULD SHAMPOO

Regular verb: shampoo - shampooed - shampooed

Affirmation

Simple form	V-ing form
I could shampoo you could shampoo she could shampoo we could shampoo you could shampoo they could shampoo	I could be shampooing you could be shampooing she could be shampooing we could be shampooing you could be shampooing they could be shampooing
Perfect	V-ing perfect
I could have shampooed you could have shampooed she could have shampooed we could have shampooed you could have shampooed they could have shampooed	I could have been shampooing you could have been shampooing she could have been shampooing we could have been shampooing you could have been shampooing they could have been shampooing

Negation

Simple form	V-ing form
I couldn't shampoo you couldn't shampoo she couldn't shampoo we couldn't shampoo you couldn't shampoo they couldn't shampoo	I couldn't be shampooing you couldn't be shampooing she couldn't be shampooing we couldn't be shampooing you couldn't be shampooing they couldn't be shampooing
Perfect	V-ing perfect
I couldn't have shampooed you couldn't have shampooed she couldn't have shampooed we couldn't have shampooed you couldn't have shampooed they couldn't have shampooed	I couldn't have been shampooing you couldn't have been shampooing she couldn't have been shampooing we couldn't have been shampooing you couldn't have been shampooing they couldn't have been shampooing

Interrogative form

Simple form	V-ing form
could I shampoo? could you shampoo? could she shampoo? could we shampoo? could you shampoo? could they shampoo?	could I be shampooing? could you be shampooing? could she be shampooing? could we be shampooing? could you be shampooing? could they be shampooing?
Perfect	V-ing perfect
could I have shampooed? could you have shampooed? could she have shampooed? could we have shampooed? could you have shampooed? could they have shampooed?	could I have been shampooing? could you have been shampooing? could she have been shampooing? could we have been shampooing? could you have been shampooing? could they have been shampooing?

Interro-negative form

Simple form	V-ing form
couldn't I shampoo? couldn't you shampoo? couldn't she shampoo? couldn't we shampoo? couldn't you shampoo? couldn't they shampoo?	couldn't I be shampooing? couldn't you be shampooing? couldn't she be shampooing? couldn't we be shampooing? couldn't you be shampooing? couldn't they be shampooing?
Perfect	V-ing perfect
couldn't I have shampooed? couldn't you have shampooed? couldn't she have shampooed? couldn't we have shampooed? couldn't you have shampooed? couldn't they have shampooed?	couldn't I have been shampooing? couldn't you have been shampooing? couldn't she have been shampooing? couldn't we have been shampooing? couldn't you have been shampooing? couldn't they have been shampooing?