I can frequent you can frequent he can frequent we can frequent you can frequent they can frequent
V-ing form
I can be frequenting you can be frequenting he can be frequenting we can be frequenting you can be frequenting they can be frequenting
Perfect
I can have frequented you can have frequented he 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 he can have been frequenting we can have been frequenting you can have been frequenting they can have been frequenting
Negation
Simple form
I can't frequent you can't frequent he can't frequent we can't frequent you can't frequent they can't frequent
V-ing form
I can't be frequenting you can't be frequenting he can't be frequenting we can't be frequenting you can't be frequenting they can't be frequenting
Perfect
I can't have frequented you can't have frequented he can't have frequented we can't have frequented you can't have frequented they can't have frequented
V-ing perfect
I can't have been frequenting you can't have been frequenting he can't have been frequenting we can't have been frequenting you can't have been frequenting they can't have been frequenting
Interrogative form
Simple form
can I frequent? can you frequent? can he frequent? can we frequent? can you frequent? can they frequent?
V-ing form
can I be frequenting? can you be frequenting? can he be frequenting? can we be frequenting? can you be frequenting? can they be frequenting?
Perfect
can I have frequented? can you have frequented? can he 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 he have been frequenting? can we have been frequenting? can you have been frequenting? can they have been frequenting?
Interro-negative form
Simple form
can't I frequent? can't you frequent? can't he frequent? can't we frequent? can't you frequent? can't they frequent?
V-ing form
can't I be frequenting? can't you be frequenting? can't he be frequenting? can't we be frequenting? can't you be frequenting? can't they be frequenting?
Perfect
can't I have frequented? can't you have frequented? can't he have frequented? can't we have frequented? can't you have frequented? can't they have frequented?
V-ing perfect
can't I have been frequenting? can't you have been frequenting? can't he have been frequenting? can't we have been frequenting? can't you have been frequenting? can't they have been frequenting?