I should square you should square he should square we should square you should square they should square
V-ing form
I should be squaring you should be squaring he should be squaring we should be squaring you should be squaring they should be squaring
Perfect
I should have squared you should have squared he should have squared we should have squared you should have squared they should have squared
V-ing perfect
I should have been squaring you should have been squaring he should have been squaring we should have been squaring you should have been squaring they should have been squaring
Negation
Simple form
I should not square you should not square he should not square we should not square you should not square they should not square
V-ing form
I should not be squaring you should not be squaring he should not be squaring we should not be squaring you should not be squaring they should not be squaring
Perfect
I should not have squared you should not have squared he should not have squared we should not have squared you should not have squared they should not have squared
V-ing perfect
I should not have been squaring you should not have been squaring he should not have been squaring we should not have been squaring you should not have been squaring they should not have been squaring
Interrogative form
Simple form
should I square? should you square? should he square? should we square? should you square? should they square?
V-ing form
should I be squaring? should you be squaring? should he be squaring? should we be squaring? should you be squaring? should they be squaring?
Perfect
should I have squared? should you have squared? should he have squared? should we have squared? should you have squared? should they have squared?
V-ing perfect
should I have been squaring? should you have been squaring? should he have been squaring? should we have been squaring? should you have been squaring? should they have been squaring?
Interro-negative form
Simple form
should I not square? should you not square? should he not square? should we not square? should you not square? should they not square?
V-ing form
should I not be squaring? should you not be squaring? should he not be squaring? should we not be squaring? should you not be squaring? should they not be squaring?
Perfect
should I not have squared? should you not have squared? should he not have squared? should we not have squared? should you not have squared? should they not have squared?
V-ing perfect
should I not have been squaring? should you not have been squaring? should he not have been squaring? should we not have been squaring? should you not have been squaring? should they not have been squaring?