English verb conjugation
CAN SQUARE

Regular verb: square - squared - squared

Affirmation

Simple form	V-ing form
I can square you can square she can square we can square you can square they can square	I can be squaring you can be squaring she can be squaring we can be squaring you can be squaring they can be squaring
Perfect	V-ing perfect
I can have squared you can have squared she can have squared we can have squared you can have squared they can have squared	I can have been squaring you can have been squaring she can have been squaring we can have been squaring you can have been squaring they can have been squaring

Negation

Simple form	V-ing form
I cannot square you cannot square she cannot square we cannot square you cannot square they cannot square	I cannot be squaring you cannot be squaring she cannot be squaring we cannot be squaring you cannot be squaring they cannot be squaring
Perfect	V-ing perfect
I cannot have squared you cannot have squared she cannot have squared we cannot have squared you cannot have squared they cannot have squared	I cannot have been squaring you cannot have been squaring she cannot have been squaring we cannot have been squaring you cannot have been squaring they cannot have been squaring

Interrogative form

Simple form	V-ing form
can I square? can you square? can she square? can we square? can you square? can they square?	can I be squaring? can you be squaring? can she be squaring? can we be squaring? can you be squaring? can they be squaring?
Perfect	V-ing perfect
can I have squared? can you have squared? can she have squared? can we have squared? can you have squared? can they have squared?	can I have been squaring? can you have been squaring? can she have been squaring? can we have been squaring? can you have been squaring? can they have been squaring?

Interro-negative form

Simple form	V-ing form
can I not square? can you not square? can she not square? can we not square? can you not square? can they not square?	can I not be squaring? can you not be squaring? can she not be squaring? can we not be squaring? can you not be squaring? can they not be squaring?
Perfect	V-ing perfect
can I not have squared? can you not have squared? can she not have squared? can we not have squared? can you not have squared? can they not have squared?	can I not have been squaring? can you not have been squaring? can she not have been squaring? can we not have been squaring? can you not have been squaring? can they not have been squaring?