English verb conjugation
COULD PREMIX

Regular verb: premix - premixed - premixed

Affirmation

Simple form	V-ing form
I could premix you could premix he could premix we could premix you could premix they could premix	I could be premixing you could be premixing he could be premixing we could be premixing you could be premixing they could be premixing
Perfect	V-ing perfect
I could have premixed you could have premixed he could have premixed we could have premixed you could have premixed they could have premixed	I could have been premixing you could have been premixing he could have been premixing we could have been premixing you could have been premixing they could have been premixing

Negation

Simple form	V-ing form
I could not premix you could not premix he could not premix we could not premix you could not premix they could not premix	I could not be premixing you could not be premixing he could not be premixing we could not be premixing you could not be premixing they could not be premixing
Perfect	V-ing perfect
I could not have premixed you could not have premixed he could not have premixed we could not have premixed you could not have premixed they could not have premixed	I could not have been premixing you could not have been premixing he could not have been premixing we could not have been premixing you could not have been premixing they could not have been premixing

Interrogative form

Simple form	V-ing form
could I premix? could you premix? could he premix? could we premix? could you premix? could they premix?	could I be premixing? could you be premixing? could he be premixing? could we be premixing? could you be premixing? could they be premixing?
Perfect	V-ing perfect
could I have premixed? could you have premixed? could he have premixed? could we have premixed? could you have premixed? could they have premixed?	could I have been premixing? could you have been premixing? could he have been premixing? could we have been premixing? could you have been premixing? could they have been premixing?

Interro-negative form

Simple form	V-ing form
could I not premix? could you not premix? could he not premix? could we not premix? could you not premix? could they not premix?	could I not be premixing? could you not be premixing? could he not be premixing? could we not be premixing? could you not be premixing? could they not be premixing?
Perfect	V-ing perfect
could I not have premixed? could you not have premixed? could he not have premixed? could we not have premixed? could you not have premixed? could they not have premixed?	could I not have been premixing? could you not have been premixing? could he not have been premixing? could we not have been premixing? could you not have been premixing? could they not have been premixing?