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