I should squint you should squint he should squint we should squint you should squint they should squint
V-ing form
I should be squinting you should be squinting he should be squinting we should be squinting you should be squinting they should be squinting
Perfect
I should have squinted you should have squinted he should have squinted we should have squinted you should have squinted they should have squinted
V-ing perfect
I should have been squinting you should have been squinting he should have been squinting we should have been squinting you should have been squinting they should have been squinting
Negation
Simple form
I should not squint you should not squint he should not squint we should not squint you should not squint they should not squint
V-ing form
I should not be squinting you should not be squinting he should not be squinting we should not be squinting you should not be squinting they should not be squinting
Perfect
I should not have squinted you should not have squinted he should not have squinted we should not have squinted you should not have squinted they should not have squinted
V-ing perfect
I should not have been squinting you should not have been squinting he should not have been squinting we should not have been squinting you should not have been squinting they should not have been squinting
Interrogative form
Simple form
should I squint? should you squint? should he squint? should we squint? should you squint? should they squint?
V-ing form
should I be squinting? should you be squinting? should he be squinting? should we be squinting? should you be squinting? should they be squinting?
Perfect
should I have squinted? should you have squinted? should he have squinted? should we have squinted? should you have squinted? should they have squinted?
V-ing perfect
should I have been squinting? should you have been squinting? should he have been squinting? should we have been squinting? should you have been squinting? should they have been squinting?
Interro-negative form
Simple form
should I not squint? should you not squint? should he not squint? should we not squint? should you not squint? should they not squint?
V-ing form
should I not be squinting? should you not be squinting? should he not be squinting? should we not be squinting? should you not be squinting? should they not be squinting?
Perfect
should I not have squinted? should you not have squinted? should he not have squinted? should we not have squinted? should you not have squinted? should they not have squinted?
V-ing perfect
should I not have been squinting? should you not have been squinting? should he not have been squinting? should we not have been squinting? should you not have been squinting? should they not have been squinting?