I can cache you can cache she can cache we can cache you can cache they can cache
V-ing form
I can be caching you can be caching she can be caching we can be caching you can be caching they can be caching
Perfect
I can have cached you can have cached she can have cached we can have cached you can have cached they can have cached
V-ing perfect
I can have been caching you can have been caching she can have been caching we can have been caching you can have been caching they can have been caching
Negation
Simple form
I cannot cache you cannot cache she cannot cache we cannot cache you cannot cache they cannot cache
V-ing form
I cannot be caching you cannot be caching she cannot be caching we cannot be caching you cannot be caching they cannot be caching
Perfect
I cannot have cached you cannot have cached she cannot have cached we cannot have cached you cannot have cached they cannot have cached
V-ing perfect
I cannot have been caching you cannot have been caching she cannot have been caching we cannot have been caching you cannot have been caching they cannot have been caching
Interrogative form
Simple form
can I cache? can you cache? can she cache? can we cache? can you cache? can they cache?
V-ing form
can I be caching? can you be caching? can she be caching? can we be caching? can you be caching? can they be caching?
Perfect
can I have cached? can you have cached? can she have cached? can we have cached? can you have cached? can they have cached?
V-ing perfect
can I have been caching? can you have been caching? can she have been caching? can we have been caching? can you have been caching? can they have been caching?
Interro-negative form
Simple form
can I not cache? can you not cache? can she not cache? can we not cache? can you not cache? can they not cache?
V-ing form
can I not be caching? can you not be caching? can she not be caching? can we not be caching? can you not be caching? can they not be caching?
Perfect
can I not have cached? can you not have cached? can she not have cached? can we not have cached? can you not have cached? can they not have cached?
V-ing perfect
can I not have been caching? can you not have been caching? can she not have been caching? can we not have been caching? can you not have been caching? can they not have been caching?