I should backpack you should backpack he should backpack we should backpack you should backpack they should backpack
V-ing form
I should be backpacking you should be backpacking he should be backpacking we should be backpacking you should be backpacking they should be backpacking
Perfect
I should have backpacked you should have backpacked he should have backpacked we should have backpacked you should have backpacked they should have backpacked
V-ing perfect
I should have been backpacking you should have been backpacking he should have been backpacking we should have been backpacking you should have been backpacking they should have been backpacking
Negation
Simple form
I should not backpack you should not backpack he should not backpack we should not backpack you should not backpack they should not backpack
V-ing form
I should not be backpacking you should not be backpacking he should not be backpacking we should not be backpacking you should not be backpacking they should not be backpacking
Perfect
I should not have backpacked you should not have backpacked he should not have backpacked we should not have backpacked you should not have backpacked they should not have backpacked
V-ing perfect
I should not have been backpacking you should not have been backpacking he should not have been backpacking we should not have been backpacking you should not have been backpacking they should not have been backpacking
Interrogative form
Simple form
should I backpack? should you backpack? should he backpack? should we backpack? should you backpack? should they backpack?
V-ing form
should I be backpacking? should you be backpacking? should he be backpacking? should we be backpacking? should you be backpacking? should they be backpacking?
Perfect
should I have backpacked? should you have backpacked? should he have backpacked? should we have backpacked? should you have backpacked? should they have backpacked?
V-ing perfect
should I have been backpacking? should you have been backpacking? should he have been backpacking? should we have been backpacking? should you have been backpacking? should they have been backpacking?
Interro-negative form
Simple form
should I not backpack? should you not backpack? should he not backpack? should we not backpack? should you not backpack? should they not backpack?
V-ing form
should I not be backpacking? should you not be backpacking? should he not be backpacking? should we not be backpacking? should you not be backpacking? should they not be backpacking?
Perfect
should I not have backpacked? should you not have backpacked? should he not have backpacked? should we not have backpacked? should you not have backpacked? should they not have backpacked?
V-ing perfect
should I not have been backpacking? should you not have been backpacking? should he not have been backpacking? should we not have been backpacking? should you not have been backpacking? should they not have been backpacking?