I'd fast you'd fast he'd fast we'd fast you'd fast they'd fast
V-ing form
I'd be fasting you'd be fasting he'd be fasting we'd be fasting you'd be fasting they'd be fasting
Perfect
I should've fasted you should've fasted he 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 he 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 he 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 he 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 he 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 he 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 he fast? should we fast? should you fast? should they fast?
V-ing form
should I be fasting? should you be fasting? should he be fasting? should we be fasting? should you be fasting? should they be fasting?
Perfect
should I have fasted? should you have fasted? should he 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 he 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 he 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 he 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 he 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 he have been fasting? shouldn't we have been fasting? shouldn't you have been fasting? shouldn't they have been fasting?