I should discard you should discard he should discard we should discard you should discard they should discard
V-ing form
I should be discarding you should be discarding he should be discarding we should be discarding you should be discarding they should be discarding
Perfect
I should have discarded you should have discarded he should have discarded we should have discarded you should have discarded they should have discarded
V-ing perfect
I should have been discarding you should have been discarding he should have been discarding we should have been discarding you should have been discarding they should have been discarding
Negation
Simple form
I should not discard you should not discard he should not discard we should not discard you should not discard they should not discard
V-ing form
I should not be discarding you should not be discarding he should not be discarding we should not be discarding you should not be discarding they should not be discarding
Perfect
I should not have discarded you should not have discarded he should not have discarded we should not have discarded you should not have discarded they should not have discarded
V-ing perfect
I should not have been discarding you should not have been discarding he should not have been discarding we should not have been discarding you should not have been discarding they should not have been discarding
Interrogative form
Simple form
should I discard? should you discard? should he discard? should we discard? should you discard? should they discard?
V-ing form
should I be discarding? should you be discarding? should he be discarding? should we be discarding? should you be discarding? should they be discarding?
Perfect
should I have discarded? should you have discarded? should he have discarded? should we have discarded? should you have discarded? should they have discarded?
V-ing perfect
should I have been discarding? should you have been discarding? should he have been discarding? should we have been discarding? should you have been discarding? should they have been discarding?
Interro-negative form
Simple form
should I not discard? should you not discard? should he not discard? should we not discard? should you not discard? should they not discard?
V-ing form
should I not be discarding? should you not be discarding? should he not be discarding? should we not be discarding? should you not be discarding? should they not be discarding?
Perfect
should I not have discarded? should you not have discarded? should he not have discarded? should we not have discarded? should you not have discarded? should they not have discarded?
V-ing perfect
should I not have been discarding? should you not have been discarding? should he not have been discarding? should we not have been discarding? should you not have been discarding? should they not have been discarding?