I can punctuate you can punctuate she can punctuate we can punctuate you can punctuate they can punctuate
V-ing form
I can be punctuating you can be punctuating she can be punctuating we can be punctuating you can be punctuating they can be punctuating
Perfect
I can have punctuated you can have punctuated she can have punctuated we can have punctuated you can have punctuated they can have punctuated
V-ing perfect
I can have been punctuating you can have been punctuating she can have been punctuating we can have been punctuating you can have been punctuating they can have been punctuating
Negation
Simple form
I can't punctuate you can't punctuate she can't punctuate we can't punctuate you can't punctuate they can't punctuate
V-ing form
I can't be punctuating you can't be punctuating she can't be punctuating we can't be punctuating you can't be punctuating they can't be punctuating
Perfect
I can't have punctuated you can't have punctuated she can't have punctuated we can't have punctuated you can't have punctuated they can't have punctuated
V-ing perfect
I can't have been punctuating you can't have been punctuating she can't have been punctuating we can't have been punctuating you can't have been punctuating they can't have been punctuating
Interrogative form
Simple form
can I punctuate? can you punctuate? can she punctuate? can we punctuate? can you punctuate? can they punctuate?
V-ing form
can I be punctuating? can you be punctuating? can she be punctuating? can we be punctuating? can you be punctuating? can they be punctuating?
Perfect
can I have punctuated? can you have punctuated? can she have punctuated? can we have punctuated? can you have punctuated? can they have punctuated?
V-ing perfect
can I have been punctuating? can you have been punctuating? can she have been punctuating? can we have been punctuating? can you have been punctuating? can they have been punctuating?
Interro-negative form
Simple form
can't I punctuate? can't you punctuate? can't she punctuate? can't we punctuate? can't you punctuate? can't they punctuate?
V-ing form
can't I be punctuating? can't you be punctuating? can't she be punctuating? can't we be punctuating? can't you be punctuating? can't they be punctuating?
Perfect
can't I have punctuated? can't you have punctuated? can't she have punctuated? can't we have punctuated? can't you have punctuated? can't they have punctuated?
V-ing perfect
can't I have been punctuating? can't you have been punctuating? can't she have been punctuating? can't we have been punctuating? can't you have been punctuating? can't they have been punctuating?