I can smell you can smell she can smell we can smell you can smell they can smell
V-ing form
I can be smelling you can be smelling she can be smelling we can be smelling you can be smelling they can be smelling
Perfect
I can have smelled, smelt you can have smelled, smelt she can have smelled, smelt we can have smelled, smelt you can have smelled, smelt they can have smelled, smelt
V-ing perfect
I can have been smelling you can have been smelling she can have been smelling we can have been smelling you can have been smelling they can have been smelling
Negation
Simple form
I cannot smell you cannot smell she cannot smell we cannot smell you cannot smell they cannot smell
V-ing form
I cannot be smelling you cannot be smelling she cannot be smelling we cannot be smelling you cannot be smelling they cannot be smelling
Perfect
I cannot have smelled, smelt you cannot have smelled, smelt she cannot have smelled, smelt we cannot have smelled, smelt you cannot have smelled, smelt they cannot have smelled, smelt
V-ing perfect
I cannot have been smelling you cannot have been smelling she cannot have been smelling we cannot have been smelling you cannot have been smelling they cannot have been smelling
Interrogative form
Simple form
can I smell? can you smell? can she smell? can we smell? can you smell? can they smell?
V-ing form
can I be smelling? can you be smelling? can she be smelling? can we be smelling? can you be smelling? can they be smelling?
Perfect
can I have smelled, smelt? can you have smelled, smelt? can she have smelled, smelt? can we have smelled, smelt? can you have smelled, smelt? can they have smelled, smelt?
V-ing perfect
can I have been smelling? can you have been smelling? can she have been smelling? can we have been smelling? can you have been smelling? can they have been smelling?
Interro-negative form
Simple form
can I not smell? can you not smell? can she not smell? can we not smell? can you not smell? can they not smell?
V-ing form
can I not be smelling? can you not be smelling? can she not be smelling? can we not be smelling? can you not be smelling? can they not be smelling?
Perfect
can I not have smelled, smelt? can you not have smelled, smelt? can she not have smelled, smelt? can we not have smelled, smelt? can you not have smelled, smelt? can they not have smelled, smelt?
V-ing perfect
can I not have been smelling? can you not have been smelling? can she not have been smelling? can we not have been smelling? can you not have been smelling? can they not have been smelling?