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