I should fork you should fork he should fork we should fork you should fork they should fork
V-ing form
I should be forking you should be forking he should be forking we should be forking you should be forking they should be forking
Perfect
I should have forked you should have forked he should have forked we should have forked you should have forked they should have forked
V-ing perfect
I should have been forking you should have been forking he should have been forking we should have been forking you should have been forking they should have been forking
Negation
Simple form
I should not fork you should not fork he should not fork we should not fork you should not fork they should not fork
V-ing form
I should not be forking you should not be forking he should not be forking we should not be forking you should not be forking they should not be forking
Perfect
I should not have forked you should not have forked he should not have forked we should not have forked you should not have forked they should not have forked
V-ing perfect
I should not have been forking you should not have been forking he should not have been forking we should not have been forking you should not have been forking they should not have been forking
Interrogative form
Simple form
should I fork? should you fork? should he fork? should we fork? should you fork? should they fork?
V-ing form
should I be forking? should you be forking? should he be forking? should we be forking? should you be forking? should they be forking?
Perfect
should I have forked? should you have forked? should he have forked? should we have forked? should you have forked? should they have forked?
V-ing perfect
should I have been forking? should you have been forking? should he have been forking? should we have been forking? should you have been forking? should they have been forking?
Interro-negative form
Simple form
should I not fork? should you not fork? should he not fork? should we not fork? should you not fork? should they not fork?
V-ing form
should I not be forking? should you not be forking? should he not be forking? should we not be forking? should you not be forking? should they not be forking?
Perfect
should I not have forked? should you not have forked? should he not have forked? should we not have forked? should you not have forked? should they not have forked?
V-ing perfect
should I not have been forking? should you not have been forking? should he not have been forking? should we not have been forking? should you not have been forking? should they not have been forking?