I should giggle you should giggle he should giggle we should giggle you should giggle they should giggle
V-ing form
I should be giggling you should be giggling he should be giggling we should be giggling you should be giggling they should be giggling
Perfect
I should have giggled you should have giggled he should have giggled we should have giggled you should have giggled they should have giggled
V-ing perfect
I should have been giggling you should have been giggling he should have been giggling we should have been giggling you should have been giggling they should have been giggling
Negation
Simple form
I should not giggle you should not giggle he should not giggle we should not giggle you should not giggle they should not giggle
V-ing form
I should not be giggling you should not be giggling he should not be giggling we should not be giggling you should not be giggling they should not be giggling
Perfect
I should not have giggled you should not have giggled he should not have giggled we should not have giggled you should not have giggled they should not have giggled
V-ing perfect
I should not have been giggling you should not have been giggling he should not have been giggling we should not have been giggling you should not have been giggling they should not have been giggling
Interrogative form
Simple form
should I giggle? should you giggle? should he giggle? should we giggle? should you giggle? should they giggle?
V-ing form
should I be giggling? should you be giggling? should he be giggling? should we be giggling? should you be giggling? should they be giggling?
Perfect
should I have giggled? should you have giggled? should he have giggled? should we have giggled? should you have giggled? should they have giggled?
V-ing perfect
should I have been giggling? should you have been giggling? should he have been giggling? should we have been giggling? should you have been giggling? should they have been giggling?
Interro-negative form
Simple form
should I not giggle? should you not giggle? should he not giggle? should we not giggle? should you not giggle? should they not giggle?
V-ing form
should I not be giggling? should you not be giggling? should he not be giggling? should we not be giggling? should you not be giggling? should they not be giggling?
Perfect
should I not have giggled? should you not have giggled? should he not have giggled? should we not have giggled? should you not have giggled? should they not have giggled?
V-ing perfect
should I not have been giggling? should you not have been giggling? should he not have been giggling? should we not have been giggling? should you not have been giggling? should they not have been giggling?