I'd be skidding you'd be skidding she'd be skidding we'd be skidding you'd be skidding they'd be skidding
Perfect
I should've skidded you should've skidded she should've skidded we should've skidded you should've skidded they should've skidded
V-ing perfect
I should've been skidding you should've been skidding she should've been skidding we should've been skidding you should've been skidding they should've been skidding
Negation
Simple form
I shouldn't skid you shouldn't skid she shouldn't skid we shouldn't skid you shouldn't skid they shouldn't skid
V-ing form
I shouldn't be skidding you shouldn't be skidding she shouldn't be skidding we shouldn't be skidding you shouldn't be skidding they shouldn't be skidding
Perfect
I shouldn't have skidded you shouldn't have skidded she shouldn't have skidded we shouldn't have skidded you shouldn't have skidded they shouldn't have skidded
V-ing perfect
I shouldn't have been skidding you shouldn't have been skidding she shouldn't have been skidding we shouldn't have been skidding you shouldn't have been skidding they shouldn't have been skidding
Interrogative form
Simple form
should I skid? should you skid? should she skid? should we skid? should you skid? should they skid?
V-ing form
should I be skidding? should you be skidding? should she be skidding? should we be skidding? should you be skidding? should they be skidding?
Perfect
should I have skidded? should you have skidded? should she have skidded? should we have skidded? should you have skidded? should they have skidded?
V-ing perfect
should I have been skidding? should you have been skidding? should she have been skidding? should we have been skidding? should you have been skidding? should they have been skidding?
Interro-negative form
Simple form
shouldn't I skid? shouldn't you skid? shouldn't she skid? shouldn't we skid? shouldn't you skid? shouldn't they skid?
V-ing form
shouldn't I be skidding? shouldn't you be skidding? shouldn't she be skidding? shouldn't we be skidding? shouldn't you be skidding? shouldn't they be skidding?
Perfect
shouldn't I have skidded? shouldn't you have skidded? shouldn't she have skidded? shouldn't we have skidded? shouldn't you have skidded? shouldn't they have skidded?
V-ing perfect
shouldn't I have been skidding? shouldn't you have been skidding? shouldn't she have been skidding? shouldn't we have been skidding? shouldn't you have been skidding? shouldn't they have been skidding?