English verb conjugation
COULD ZING

Regular verb: zing - zinged - zinged

Affirmation

Simple form	V-ing form
I could zing you could zing he could zing we could zing you could zing they could zing	I could be zinging you could be zinging he could be zinging we could be zinging you could be zinging they could be zinging
Perfect	V-ing perfect
I could have zinged you could have zinged he could have zinged we could have zinged you could have zinged they could have zinged	I could have been zinging you could have been zinging he could have been zinging we could have been zinging you could have been zinging they could have been zinging

Negation

Simple form	V-ing form
I could not zing you could not zing he could not zing we could not zing you could not zing they could not zing	I could not be zinging you could not be zinging he could not be zinging we could not be zinging you could not be zinging they could not be zinging
Perfect	V-ing perfect
I could not have zinged you could not have zinged he could not have zinged we could not have zinged you could not have zinged they could not have zinged	I could not have been zinging you could not have been zinging he could not have been zinging we could not have been zinging you could not have been zinging they could not have been zinging

Interrogative form

Simple form	V-ing form
could I zing? could you zing? could he zing? could we zing? could you zing? could they zing?	could I be zinging? could you be zinging? could he be zinging? could we be zinging? could you be zinging? could they be zinging?
Perfect	V-ing perfect
could I have zinged? could you have zinged? could he have zinged? could we have zinged? could you have zinged? could they have zinged?	could I have been zinging? could you have been zinging? could he have been zinging? could we have been zinging? could you have been zinging? could they have been zinging?

Interro-negative form

Simple form	V-ing form
could I not zing? could you not zing? could he not zing? could we not zing? could you not zing? could they not zing?	could I not be zinging? could you not be zinging? could he not be zinging? could we not be zinging? could you not be zinging? could they not be zinging?
Perfect	V-ing perfect
could I not have zinged? could you not have zinged? could he not have zinged? could we not have zinged? could you not have zinged? could they not have zinged?	could I not have been zinging? could you not have been zinging? could he not have been zinging? could we not have been zinging? could you not have been zinging? could they not have been zinging?