I can frequent you can frequent she can frequent we can frequent you can frequent they can frequent
V-ing form
I can be frequenting you can be frequenting she can be frequenting we can be frequenting you can be frequenting they can be frequenting
Perfect
I can have frequented you can have frequented she can have frequented we can have frequented you can have frequented they can have frequented
V-ing perfect
I can have been frequenting you can have been frequenting she can have been frequenting we can have been frequenting you can have been frequenting they can have been frequenting
Negation
Simple form
I cannot frequent you cannot frequent she cannot frequent we cannot frequent you cannot frequent they cannot frequent
V-ing form
I cannot be frequenting you cannot be frequenting she cannot be frequenting we cannot be frequenting you cannot be frequenting they cannot be frequenting
Perfect
I cannot have frequented you cannot have frequented she cannot have frequented we cannot have frequented you cannot have frequented they cannot have frequented
V-ing perfect
I cannot have been frequenting you cannot have been frequenting she cannot have been frequenting we cannot have been frequenting you cannot have been frequenting they cannot have been frequenting
Interrogative form
Simple form
can I frequent? can you frequent? can she frequent? can we frequent? can you frequent? can they frequent?
V-ing form
can I be frequenting? can you be frequenting? can she be frequenting? can we be frequenting? can you be frequenting? can they be frequenting?
Perfect
can I have frequented? can you have frequented? can she have frequented? can we have frequented? can you have frequented? can they have frequented?
V-ing perfect
can I have been frequenting? can you have been frequenting? can she have been frequenting? can we have been frequenting? can you have been frequenting? can they have been frequenting?
Interro-negative form
Simple form
can I not frequent? can you not frequent? can she not frequent? can we not frequent? can you not frequent? can they not frequent?
V-ing form
can I not be frequenting? can you not be frequenting? can she not be frequenting? can we not be frequenting? can you not be frequenting? can they not be frequenting?
Perfect
can I not have frequented? can you not have frequented? can she not have frequented? can we not have frequented? can you not have frequented? can they not have frequented?
V-ing perfect
can I not have been frequenting? can you not have been frequenting? can she not have been frequenting? can we not have been frequenting? can you not have been frequenting? can they not have been frequenting?