I could unlade you could unlade she could unlade we could unlade you could unlade they could unlade
V-ing form
I could be unlading you could be unlading she could be unlading we could be unlading you could be unlading they could be unlading
Perfect
I could have unladed you could have unladed she could have unladed we could have unladed you could have unladed they could have unladed
V-ing perfect
I could have been unlading you could have been unlading she could have been unlading we could have been unlading you could have been unlading they could have been unlading
Negation
Simple form
I could not unlade you could not unlade she could not unlade we could not unlade you could not unlade they could not unlade
V-ing form
I could not be unlading you could not be unlading she could not be unlading we could not be unlading you could not be unlading they could not be unlading
Perfect
I could not have unladed you could not have unladed she could not have unladed we could not have unladed you could not have unladed they could not have unladed
V-ing perfect
I could not have been unlading you could not have been unlading she could not have been unlading we could not have been unlading you could not have been unlading they could not have been unlading
Interrogative form
Simple form
could I unlade? could you unlade? could she unlade? could we unlade? could you unlade? could they unlade?
V-ing form
could I be unlading? could you be unlading? could she be unlading? could we be unlading? could you be unlading? could they be unlading?
Perfect
could I have unladed? could you have unladed? could she have unladed? could we have unladed? could you have unladed? could they have unladed?
V-ing perfect
could I have been unlading? could you have been unlading? could she have been unlading? could we have been unlading? could you have been unlading? could they have been unlading?
Interro-negative form
Simple form
could I not unlade? could you not unlade? could she not unlade? could we not unlade? could you not unlade? could they not unlade?
V-ing form
could I not be unlading? could you not be unlading? could she not be unlading? could we not be unlading? could you not be unlading? could they not be unlading?
Perfect
could I not have unladed? could you not have unladed? could she not have unladed? could we not have unladed? could you not have unladed? could they not have unladed?
V-ing perfect
could I not have been unlading? could you not have been unlading? could she not have been unlading? could we not have been unlading? could you not have been unlading? could they not have been unlading?