I can complain you can complain he can complain we can complain you can complain they can complain
V-ing form
I can be complaining you can be complaining he can be complaining we can be complaining you can be complaining they can be complaining
Perfect
I can have complained you can have complained he can have complained we can have complained you can have complained they can have complained
V-ing perfect
I can have been complaining you can have been complaining he can have been complaining we can have been complaining you can have been complaining they can have been complaining
Negation
Simple form
I can't complain you can't complain he can't complain we can't complain you can't complain they can't complain
V-ing form
I can't be complaining you can't be complaining he can't be complaining we can't be complaining you can't be complaining they can't be complaining
Perfect
I can't have complained you can't have complained he can't have complained we can't have complained you can't have complained they can't have complained
V-ing perfect
I can't have been complaining you can't have been complaining he can't have been complaining we can't have been complaining you can't have been complaining they can't have been complaining
Interrogative form
Simple form
can I complain? can you complain? can he complain? can we complain? can you complain? can they complain?
V-ing form
can I be complaining? can you be complaining? can he be complaining? can we be complaining? can you be complaining? can they be complaining?
Perfect
can I have complained? can you have complained? can he have complained? can we have complained? can you have complained? can they have complained?
V-ing perfect
can I have been complaining? can you have been complaining? can he have been complaining? can we have been complaining? can you have been complaining? can they have been complaining?
Interro-negative form
Simple form
can't I complain? can't you complain? can't he complain? can't we complain? can't you complain? can't they complain?
V-ing form
can't I be complaining? can't you be complaining? can't he be complaining? can't we be complaining? can't you be complaining? can't they be complaining?
Perfect
can't I have complained? can't you have complained? can't he have complained? can't we have complained? can't you have complained? can't they have complained?
V-ing perfect
can't I have been complaining? can't you have been complaining? can't he have been complaining? can't we have been complaining? can't you have been complaining? can't they have been complaining?