I can datestamp you can datestamp he can datestamp we can datestamp you can datestamp they can datestamp
V-ing form
I can be datestamping you can be datestamping he can be datestamping we can be datestamping you can be datestamping they can be datestamping
Perfect
I can have datestamped you can have datestamped he can have datestamped we can have datestamped you can have datestamped they can have datestamped
V-ing perfect
I can have been datestamping you can have been datestamping he can have been datestamping we can have been datestamping you can have been datestamping they can have been datestamping
Negation
Simple form
I cannot datestamp you cannot datestamp he cannot datestamp we cannot datestamp you cannot datestamp they cannot datestamp
V-ing form
I cannot be datestamping you cannot be datestamping he cannot be datestamping we cannot be datestamping you cannot be datestamping they cannot be datestamping
Perfect
I cannot have datestamped you cannot have datestamped he cannot have datestamped we cannot have datestamped you cannot have datestamped they cannot have datestamped
V-ing perfect
I cannot have been datestamping you cannot have been datestamping he cannot have been datestamping we cannot have been datestamping you cannot have been datestamping they cannot have been datestamping
Interrogative form
Simple form
can I datestamp? can you datestamp? can he datestamp? can we datestamp? can you datestamp? can they datestamp?
V-ing form
can I be datestamping? can you be datestamping? can he be datestamping? can we be datestamping? can you be datestamping? can they be datestamping?
Perfect
can I have datestamped? can you have datestamped? can he have datestamped? can we have datestamped? can you have datestamped? can they have datestamped?
V-ing perfect
can I have been datestamping? can you have been datestamping? can he have been datestamping? can we have been datestamping? can you have been datestamping? can they have been datestamping?
Interro-negative form
Simple form
can I not datestamp? can you not datestamp? can he not datestamp? can we not datestamp? can you not datestamp? can they not datestamp?
V-ing form
can I not be datestamping? can you not be datestamping? can he not be datestamping? can we not be datestamping? can you not be datestamping? can they not be datestamping?
Perfect
can I not have datestamped? can you not have datestamped? can he not have datestamped? can we not have datestamped? can you not have datestamped? can they not have datestamped?
V-ing perfect
can I not have been datestamping? can you not have been datestamping? can he not have been datestamping? can we not have been datestamping? can you not have been datestamping? can they not have been datestamping?