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