I can charge you can charge she can charge we can charge you can charge they can charge
V-ing form
I can be charging you can be charging she can be charging we can be charging you can be charging they can be charging
Perfect
I can have charged you can have charged she can have charged we can have charged you can have charged they can have charged
V-ing perfect
I can have been charging you can have been charging she can have been charging we can have been charging you can have been charging they can have been charging
Negation
Simple form
I cannot charge you cannot charge she cannot charge we cannot charge you cannot charge they cannot charge
V-ing form
I cannot be charging you cannot be charging she cannot be charging we cannot be charging you cannot be charging they cannot be charging
Perfect
I cannot have charged you cannot have charged she cannot have charged we cannot have charged you cannot have charged they cannot have charged
V-ing perfect
I cannot have been charging you cannot have been charging she cannot have been charging we cannot have been charging you cannot have been charging they cannot have been charging
Interrogative form
Simple form
can I charge? can you charge? can she charge? can we charge? can you charge? can they charge?
V-ing form
can I be charging? can you be charging? can she be charging? can we be charging? can you be charging? can they be charging?
Perfect
can I have charged? can you have charged? can she have charged? can we have charged? can you have charged? can they have charged?
V-ing perfect
can I have been charging? can you have been charging? can she have been charging? can we have been charging? can you have been charging? can they have been charging?
Interro-negative form
Simple form
can I not charge? can you not charge? can she not charge? can we not charge? can you not charge? can they not charge?
V-ing form
can I not be charging? can you not be charging? can she not be charging? can we not be charging? can you not be charging? can they not be charging?
Perfect
can I not have charged? can you not have charged? can she not have charged? can we not have charged? can you not have charged? can they not have charged?
V-ing perfect
can I not have been charging? can you not have been charging? can she not have been charging? can we not have been charging? can you not have been charging? can they not have been charging?