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