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