I can number you can number he can number we can number you can number they can number
V-ing form
I can be numbering you can be numbering he can be numbering we can be numbering you can be numbering they can be numbering
Perfect
I can have numbered you can have numbered he can have numbered we can have numbered you can have numbered they can have numbered
V-ing perfect
I can have been numbering you can have been numbering he can have been numbering we can have been numbering you can have been numbering they can have been numbering
Negation
Simple form
I cannot number you cannot number he cannot number we cannot number you cannot number they cannot number
V-ing form
I cannot be numbering you cannot be numbering he cannot be numbering we cannot be numbering you cannot be numbering they cannot be numbering
Perfect
I cannot have numbered you cannot have numbered he cannot have numbered we cannot have numbered you cannot have numbered they cannot have numbered
V-ing perfect
I cannot have been numbering you cannot have been numbering he cannot have been numbering we cannot have been numbering you cannot have been numbering they cannot have been numbering
Interrogative form
Simple form
can I number? can you number? can he number? can we number? can you number? can they number?
V-ing form
can I be numbering? can you be numbering? can he be numbering? can we be numbering? can you be numbering? can they be numbering?
Perfect
can I have numbered? can you have numbered? can he have numbered? can we have numbered? can you have numbered? can they have numbered?
V-ing perfect
can I have been numbering? can you have been numbering? can he have been numbering? can we have been numbering? can you have been numbering? can they have been numbering?
Interro-negative form
Simple form
can I not number? can you not number? can he not number? can we not number? can you not number? can they not number?
V-ing form
can I not be numbering? can you not be numbering? can he not be numbering? can we not be numbering? can you not be numbering? can they not be numbering?
Perfect
can I not have numbered? can you not have numbered? can he not have numbered? can we not have numbered? can you not have numbered? can they not have numbered?
V-ing perfect
can I not have been numbering? can you not have been numbering? can he not have been numbering? can we not have been numbering? can you not have been numbering? can they not have been numbering?