I could make you could make she could make we could make you could make they could make
V-ing form
I could be making you could be making she could be making we could be making you could be making they could be making
Perfect
I could have made you could have made she could have made we could have made you could have made they could have made
V-ing perfect
I could have been making you could have been making she could have been making we could have been making you could have been making they could have been making
Negation
Simple form
I couldn't make you couldn't make she couldn't make we couldn't make you couldn't make they couldn't make
V-ing form
I couldn't be making you couldn't be making she couldn't be making we couldn't be making you couldn't be making they couldn't be making
Perfect
I couldn't have made you couldn't have made she couldn't have made we couldn't have made you couldn't have made they couldn't have made
V-ing perfect
I couldn't have been making you couldn't have been making she couldn't have been making we couldn't have been making you couldn't have been making they couldn't have been making
Interrogative form
Simple form
could I make? could you make? could she make? could we make? could you make? could they make?
V-ing form
could I be making? could you be making? could she be making? could we be making? could you be making? could they be making?
Perfect
could I have made? could you have made? could she have made? could we have made? could you have made? could they have made?
V-ing perfect
could I have been making? could you have been making? could she have been making? could we have been making? could you have been making? could they have been making?
Interro-negative form
Simple form
couldn't I make? couldn't you make? couldn't she make? couldn't we make? couldn't you make? couldn't they make?
V-ing form
couldn't I be making? couldn't you be making? couldn't she be making? couldn't we be making? couldn't you be making? couldn't they be making?
Perfect
couldn't I have made? couldn't you have made? couldn't she have made? couldn't we have made? couldn't you have made? couldn't they have made?
V-ing perfect
couldn't I have been making? couldn't you have been making? couldn't she have been making? couldn't we have been making? couldn't you have been making? couldn't they have been making?