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