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