English verb conjugation
COULD SMELL

Irregular verb: smell - smelled, smelt - smelled, smelt

Affirmation

Simple form	V-ing form
I could smell you could smell he could smell we could smell you could smell they could smell	I could be smelling you could be smelling he could be smelling we could be smelling you could be smelling they could be smelling
Perfect	V-ing perfect
I could have smelled, smelt you could have smelled, smelt he could have smelled, smelt we could have smelled, smelt you could have smelled, smelt they could have smelled, smelt	I could have been smelling you could have been smelling he could have been smelling we could have been smelling you could have been smelling they could have been smelling

Negation

Simple form	V-ing form
I couldn't smell you couldn't smell he couldn't smell we couldn't smell you couldn't smell they couldn't smell	I couldn't be smelling you couldn't be smelling he couldn't be smelling we couldn't be smelling you couldn't be smelling they couldn't be smelling
Perfect	V-ing perfect
I couldn't have smelled, smelt you couldn't have smelled, smelt he couldn't have smelled, smelt we couldn't have smelled, smelt you couldn't have smelled, smelt they couldn't have smelled, smelt	I couldn't have been smelling you couldn't have been smelling he couldn't have been smelling we couldn't have been smelling you couldn't have been smelling they couldn't have been smelling

Interrogative form

Simple form	V-ing form
could I smell? could you smell? could he smell? could we smell? could you smell? could they smell?	could I be smelling? could you be smelling? could he be smelling? could we be smelling? could you be smelling? could they be smelling?
Perfect	V-ing perfect
could I have smelled, smelt? could you have smelled, smelt? could he have smelled, smelt? could we have smelled, smelt? could you have smelled, smelt? could they have smelled, smelt?	could I have been smelling? could you have been smelling? could he have been smelling? could we have been smelling? could you have been smelling? could they have been smelling?

Interro-negative form

Simple form	V-ing form
couldn't I smell? couldn't you smell? couldn't he smell? couldn't we smell? couldn't you smell? couldn't they smell?	couldn't I be smelling? couldn't you be smelling? couldn't he be smelling? couldn't we be smelling? couldn't you be smelling? couldn't they be smelling?
Perfect	V-ing perfect
couldn't I have smelled, smelt? couldn't you have smelled, smelt? couldn't he have smelled, smelt? couldn't we have smelled, smelt? couldn't you have smelled, smelt? couldn't they have smelled, smelt?	couldn't I have been smelling? couldn't you have been smelling? couldn't he have been smelling? couldn't we have been smelling? couldn't you have been smelling? couldn't they have been smelling?