I can befriend you can befriend she can befriend we can befriend you can befriend they can befriend
V-ing form
I can be befriending you can be befriending she can be befriending we can be befriending you can be befriending they can be befriending
Perfect
I can have befriended you can have befriended she can have befriended we can have befriended you can have befriended they can have befriended
V-ing perfect
I can have been befriending you can have been befriending she can have been befriending we can have been befriending you can have been befriending they can have been befriending
Negation
Simple form
I can't befriend you can't befriend she can't befriend we can't befriend you can't befriend they can't befriend
V-ing form
I can't be befriending you can't be befriending she can't be befriending we can't be befriending you can't be befriending they can't be befriending
Perfect
I can't have befriended you can't have befriended she can't have befriended we can't have befriended you can't have befriended they can't have befriended
V-ing perfect
I can't have been befriending you can't have been befriending she can't have been befriending we can't have been befriending you can't have been befriending they can't have been befriending
Interrogative form
Simple form
can I befriend? can you befriend? can she befriend? can we befriend? can you befriend? can they befriend?
V-ing form
can I be befriending? can you be befriending? can she be befriending? can we be befriending? can you be befriending? can they be befriending?
Perfect
can I have befriended? can you have befriended? can she have befriended? can we have befriended? can you have befriended? can they have befriended?
V-ing perfect
can I have been befriending? can you have been befriending? can she have been befriending? can we have been befriending? can you have been befriending? can they have been befriending?
Interro-negative form
Simple form
can't I befriend? can't you befriend? can't she befriend? can't we befriend? can't you befriend? can't they befriend?
V-ing form
can't I be befriending? can't you be befriending? can't she be befriending? can't we be befriending? can't you be befriending? can't they be befriending?
Perfect
can't I have befriended? can't you have befriended? can't she have befriended? can't we have befriended? can't you have befriended? can't they have befriended?
V-ing perfect
can't I have been befriending? can't you have been befriending? can't she have been befriending? can't we have been befriending? can't you have been befriending? can't they have been befriending?