I'd be faxing you'd be faxing he'd be faxing we'd be faxing you'd be faxing they'd be faxing
Perfect
I should've faxed you should've faxed he should've faxed we should've faxed you should've faxed they should've faxed
V-ing perfect
I should've been faxing you should've been faxing he should've been faxing we should've been faxing you should've been faxing they should've been faxing
Negation
Simple form
I shouldn't fax you shouldn't fax he shouldn't fax we shouldn't fax you shouldn't fax they shouldn't fax
V-ing form
I shouldn't be faxing you shouldn't be faxing he shouldn't be faxing we shouldn't be faxing you shouldn't be faxing they shouldn't be faxing
Perfect
I shouldn't have faxed you shouldn't have faxed he shouldn't have faxed we shouldn't have faxed you shouldn't have faxed they shouldn't have faxed
V-ing perfect
I shouldn't have been faxing you shouldn't have been faxing he shouldn't have been faxing we shouldn't have been faxing you shouldn't have been faxing they shouldn't have been faxing
Interrogative form
Simple form
should I fax? should you fax? should he fax? should we fax? should you fax? should they fax?
V-ing form
should I be faxing? should you be faxing? should he be faxing? should we be faxing? should you be faxing? should they be faxing?
Perfect
should I have faxed? should you have faxed? should he have faxed? should we have faxed? should you have faxed? should they have faxed?
V-ing perfect
should I have been faxing? should you have been faxing? should he have been faxing? should we have been faxing? should you have been faxing? should they have been faxing?
Interro-negative form
Simple form
shouldn't I fax? shouldn't you fax? shouldn't he fax? shouldn't we fax? shouldn't you fax? shouldn't they fax?
V-ing form
shouldn't I be faxing? shouldn't you be faxing? shouldn't he be faxing? shouldn't we be faxing? shouldn't you be faxing? shouldn't they be faxing?
Perfect
shouldn't I have faxed? shouldn't you have faxed? shouldn't he have faxed? shouldn't we have faxed? shouldn't you have faxed? shouldn't they have faxed?
V-ing perfect
shouldn't I have been faxing? shouldn't you have been faxing? shouldn't he have been faxing? shouldn't we have been faxing? shouldn't you have been faxing? shouldn't they have been faxing?