English verb conjugation
COULD STING

Irregular verb: sting - stung - stung

Affirmation

Simple form	V-ing form
I could sting you could sting she could sting we could sting you could sting they could sting	I could be stinging you could be stinging she could be stinging we could be stinging you could be stinging they could be stinging
Perfect	V-ing perfect
I could have stung you could have stung she could have stung we could have stung you could have stung they could have stung	I could have been stinging you could have been stinging she could have been stinging we could have been stinging you could have been stinging they could have been stinging

Negation

Simple form	V-ing form
I could not sting you could not sting she could not sting we could not sting you could not sting they could not sting	I could not be stinging you could not be stinging she could not be stinging we could not be stinging you could not be stinging they could not be stinging
Perfect	V-ing perfect
I could not have stung you could not have stung she could not have stung we could not have stung you could not have stung they could not have stung	I could not have been stinging you could not have been stinging she could not have been stinging we could not have been stinging you could not have been stinging they could not have been stinging

Interrogative form

Simple form	V-ing form
could I sting? could you sting? could she sting? could we sting? could you sting? could they sting?	could I be stinging? could you be stinging? could she be stinging? could we be stinging? could you be stinging? could they be stinging?
Perfect	V-ing perfect
could I have stung? could you have stung? could she have stung? could we have stung? could you have stung? could they have stung?	could I have been stinging? could you have been stinging? could she have been stinging? could we have been stinging? could you have been stinging? could they have been stinging?

Interro-negative form

Simple form	V-ing form
could I not sting? could you not sting? could she not sting? could we not sting? could you not sting? could they not sting?	could I not be stinging? could you not be stinging? could she not be stinging? could we not be stinging? could you not be stinging? could they not be stinging?
Perfect	V-ing perfect
could I not have stung? could you not have stung? could she not have stung? could we not have stung? could you not have stung? could they not have stung?	could I not have been stinging? could you not have been stinging? could she not have been stinging? could we not have been stinging? could you not have been stinging? could they not have been stinging?