English verb conjugation
COULD STRING

Irregular verb: string - strung - strung

Affirmation

Simple form	V-ing form
I could string you could string she could string we could string you could string they could string	I could be stringing you could be stringing she could be stringing we could be stringing you could be stringing they could be stringing
Perfect	V-ing perfect
I could have strung you could have strung she could have strung we could have strung you could have strung they could have strung	I could have been stringing you could have been stringing she could have been stringing we could have been stringing you could have been stringing they could have been stringing

Negation

Simple form	V-ing form
I couldn't string you couldn't string she couldn't string we couldn't string you couldn't string they couldn't string	I couldn't be stringing you couldn't be stringing she couldn't be stringing we couldn't be stringing you couldn't be stringing they couldn't be stringing
Perfect	V-ing perfect
I couldn't have strung you couldn't have strung she couldn't have strung we couldn't have strung you couldn't have strung they couldn't have strung	I couldn't have been stringing you couldn't have been stringing she couldn't have been stringing we couldn't have been stringing you couldn't have been stringing they couldn't have been stringing

Interrogative form

Simple form	V-ing form
could I string? could you string? could she string? could we string? could you string? could they string?	could I be stringing? could you be stringing? could she be stringing? could we be stringing? could you be stringing? could they be stringing?
Perfect	V-ing perfect
could I have strung? could you have strung? could she have strung? could we have strung? could you have strung? could they have strung?	could I have been stringing? could you have been stringing? could she have been stringing? could we have been stringing? could you have been stringing? could they have been stringing?

Interro-negative form

Simple form	V-ing form
couldn't I string? couldn't you string? couldn't she string? couldn't we string? couldn't you string? couldn't they string?	couldn't I be stringing? couldn't you be stringing? couldn't she be stringing? couldn't we be stringing? couldn't you be stringing? couldn't they be stringing?
Perfect	V-ing perfect
couldn't I have strung? couldn't you have strung? couldn't she have strung? couldn't we have strung? couldn't you have strung? couldn't they have strung?	couldn't I have been stringing? couldn't you have been stringing? couldn't she have been stringing? couldn't we have been stringing? couldn't you have been stringing? couldn't they have been stringing?