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 couldn't taste you couldn't taste he couldn't taste we couldn't taste you couldn't taste they couldn't taste
V-ing form
I couldn't be tasting you couldn't be tasting he couldn't be tasting we couldn't be tasting you couldn't be tasting they couldn't be tasting
Perfect
I couldn't have tasted you couldn't have tasted he couldn't have tasted we couldn't have tasted you couldn't have tasted they couldn't have tasted
V-ing perfect
I couldn't have been tasting you couldn't have been tasting he couldn't have been tasting we couldn't have been tasting you couldn't have been tasting they couldn't 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
couldn't I taste? couldn't you taste? couldn't he taste? couldn't we taste? couldn't you taste? couldn't they taste?
V-ing form
couldn't I be tasting? couldn't you be tasting? couldn't he be tasting? couldn't we be tasting? couldn't you be tasting? couldn't they be tasting?
Perfect
couldn't I have tasted? couldn't you have tasted? couldn't he have tasted? couldn't we have tasted? couldn't you have tasted? couldn't they have tasted?
V-ing perfect
couldn't I have been tasting? couldn't you have been tasting? couldn't he have been tasting? couldn't we have been tasting? couldn't you have been tasting? couldn't they have been tasting?