I could admix you could admix he could admix we could admix you could admix they could admix
V-ing form
I could be admixing you could be admixing he could be admixing we could be admixing you could be admixing they could be admixing
Perfect
I could have admixed you could have admixed he could have admixed we could have admixed you could have admixed they could have admixed
V-ing perfect
I could have been admixing you could have been admixing he could have been admixing we could have been admixing you could have been admixing they could have been admixing
Negation
Simple form
I couldn't admix you couldn't admix he couldn't admix we couldn't admix you couldn't admix they couldn't admix
V-ing form
I couldn't be admixing you couldn't be admixing he couldn't be admixing we couldn't be admixing you couldn't be admixing they couldn't be admixing
Perfect
I couldn't have admixed you couldn't have admixed he couldn't have admixed we couldn't have admixed you couldn't have admixed they couldn't have admixed
V-ing perfect
I couldn't have been admixing you couldn't have been admixing he couldn't have been admixing we couldn't have been admixing you couldn't have been admixing they couldn't have been admixing
Interrogative form
Simple form
could I admix? could you admix? could he admix? could we admix? could you admix? could they admix?
V-ing form
could I be admixing? could you be admixing? could he be admixing? could we be admixing? could you be admixing? could they be admixing?
Perfect
could I have admixed? could you have admixed? could he have admixed? could we have admixed? could you have admixed? could they have admixed?
V-ing perfect
could I have been admixing? could you have been admixing? could he have been admixing? could we have been admixing? could you have been admixing? could they have been admixing?
Interro-negative form
Simple form
couldn't I admix? couldn't you admix? couldn't he admix? couldn't we admix? couldn't you admix? couldn't they admix?
V-ing form
couldn't I be admixing? couldn't you be admixing? couldn't he be admixing? couldn't we be admixing? couldn't you be admixing? couldn't they be admixing?
Perfect
couldn't I have admixed? couldn't you have admixed? couldn't he have admixed? couldn't we have admixed? couldn't you have admixed? couldn't they have admixed?
V-ing perfect
couldn't I have been admixing? couldn't you have been admixing? couldn't he have been admixing? couldn't we have been admixing? couldn't you have been admixing? couldn't they have been admixing?