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