I can charge you can charge he can charge we can charge you can charge they can charge
V-ing form
I can be charging you can be charging he can be charging we can be charging you can be charging they can be charging
Perfect
I can have charged you can have charged he 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 he can have been charging we can have been charging you can have been charging they can have been charging
Negation
Simple form
I can't charge you can't charge he can't charge we can't charge you can't charge they can't charge
V-ing form
I can't be charging you can't be charging he can't be charging we can't be charging you can't be charging they can't be charging
Perfect
I can't have charged you can't have charged he can't have charged we can't have charged you can't have charged they can't have charged
V-ing perfect
I can't have been charging you can't have been charging he can't have been charging we can't have been charging you can't have been charging they can't have been charging
Interrogative form
Simple form
can I charge? can you charge? can he charge? can we charge? can you charge? can they charge?
V-ing form
can I be charging? can you be charging? can he be charging? can we be charging? can you be charging? can they be charging?
Perfect
can I have charged? can you have charged? can he 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 he have been charging? can we have been charging? can you have been charging? can they have been charging?
Interro-negative form
Simple form
can't I charge? can't you charge? can't he charge? can't we charge? can't you charge? can't they charge?
V-ing form
can't I be charging? can't you be charging? can't he be charging? can't we be charging? can't you be charging? can't they be charging?
Perfect
can't I have charged? can't you have charged? can't he have charged? can't we have charged? can't you have charged? can't they have charged?
V-ing perfect
can't I have been charging? can't you have been charging? can't he have been charging? can't we have been charging? can't you have been charging? can't they have been charging?