I should shell you should shell he should shell we should shell you should shell they should shell
V-ing form
I should be shelling you should be shelling he should be shelling we should be shelling you should be shelling they should be shelling
Perfect
I should have shelled you should have shelled he should have shelled we should have shelled you should have shelled they should have shelled
V-ing perfect
I should have been shelling you should have been shelling he should have been shelling we should have been shelling you should have been shelling they should have been shelling
Negation
Simple form
I should not shell you should not shell he should not shell we should not shell you should not shell they should not shell
V-ing form
I should not be shelling you should not be shelling he should not be shelling we should not be shelling you should not be shelling they should not be shelling
Perfect
I should not have shelled you should not have shelled he should not have shelled we should not have shelled you should not have shelled they should not have shelled
V-ing perfect
I should not have been shelling you should not have been shelling he should not have been shelling we should not have been shelling you should not have been shelling they should not have been shelling
Interrogative form
Simple form
should I shell? should you shell? should he shell? should we shell? should you shell? should they shell?
V-ing form
should I be shelling? should you be shelling? should he be shelling? should we be shelling? should you be shelling? should they be shelling?
Perfect
should I have shelled? should you have shelled? should he have shelled? should we have shelled? should you have shelled? should they have shelled?
V-ing perfect
should I have been shelling? should you have been shelling? should he have been shelling? should we have been shelling? should you have been shelling? should they have been shelling?
Interro-negative form
Simple form
should I not shell? should you not shell? should he not shell? should we not shell? should you not shell? should they not shell?
V-ing form
should I not be shelling? should you not be shelling? should he not be shelling? should we not be shelling? should you not be shelling? should they not be shelling?
Perfect
should I not have shelled? should you not have shelled? should he not have shelled? should we not have shelled? should you not have shelled? should they not have shelled?
V-ing perfect
should I not have been shelling? should you not have been shelling? should he not have been shelling? should we not have been shelling? should you not have been shelling? should they not have been shelling?