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