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