I could taste you could taste he could taste we could taste you could taste they could taste
V-ing form
I could be tasting you could be tasting he could be tasting we could be tasting you could be tasting they could be tasting
Perfect
I could have tasted you could have tasted he could have tasted we could have tasted you could have tasted they could have tasted
V-ing perfect
I could have been tasting you could have been tasting he could have been tasting we could have been tasting you could have been tasting they could have been tasting
Negation
Simple form
I could not taste you could not taste he could not taste we could not taste you could not taste they could not taste
V-ing form
I could not be tasting you could not be tasting he could not be tasting we could not be tasting you could not be tasting they could not be tasting
Perfect
I could not have tasted you could not have tasted he could not have tasted we could not have tasted you could not have tasted they could not have tasted
V-ing perfect
I could not have been tasting you could not have been tasting he could not have been tasting we could not have been tasting you could not have been tasting they could not have been tasting
Interrogative form
Simple form
could I taste? could you taste? could he taste? could we taste? could you taste? could they taste?
V-ing form
could I be tasting? could you be tasting? could he be tasting? could we be tasting? could you be tasting? could they be tasting?
Perfect
could I have tasted? could you have tasted? could he have tasted? could we have tasted? could you have tasted? could they have tasted?
V-ing perfect
could I have been tasting? could you have been tasting? could he have been tasting? could we have been tasting? could you have been tasting? could they have been tasting?
Interro-negative form
Simple form
could I not taste? could you not taste? could he not taste? could we not taste? could you not taste? could they not taste?
V-ing form
could I not be tasting? could you not be tasting? could he not be tasting? could we not be tasting? could you not be tasting? could they not be tasting?
Perfect
could I not have tasted? could you not have tasted? could he not have tasted? could we not have tasted? could you not have tasted? could they not have tasted?
V-ing perfect
could I not have been tasting? could you not have been tasting? could he not have been tasting? could we not have been tasting? could you not have been tasting? could they not have been tasting?