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