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