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 cannot complain you cannot complain he cannot complain we cannot complain you cannot complain they cannot complain
V-ing form
I cannot be complaining you cannot be complaining he cannot be complaining we cannot be complaining you cannot be complaining they cannot be complaining
Perfect
I cannot have complained you cannot have complained he cannot have complained we cannot have complained you cannot have complained they cannot have complained
V-ing perfect
I cannot have been complaining you cannot have been complaining he cannot have been complaining we cannot have been complaining you cannot have been complaining they cannot 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 I not complain? can you not complain? can he not complain? can we not complain? can you not complain? can they not complain?
V-ing form
can I not be complaining? can you not be complaining? can he not be complaining? can we not be complaining? can you not be complaining? can they not be complaining?
Perfect
can I not have complained? can you not have complained? can he not have complained? can we not have complained? can you not have complained? can they not have complained?
V-ing perfect
can I not have been complaining? can you not have been complaining? can he not have been complaining? can we not have been complaining? can you not have been complaining? can they not have been complaining?