I could telegraph you could telegraph he could telegraph we could telegraph you could telegraph they could telegraph
V-ing form
I could be telegraphing you could be telegraphing he could be telegraphing we could be telegraphing you could be telegraphing they could be telegraphing
Perfect
I could have telegraphed you could have telegraphed he could have telegraphed we could have telegraphed you could have telegraphed they could have telegraphed
V-ing perfect
I could have been telegraphing you could have been telegraphing he could have been telegraphing we could have been telegraphing you could have been telegraphing they could have been telegraphing
Negation
Simple form
I could not telegraph you could not telegraph he could not telegraph we could not telegraph you could not telegraph they could not telegraph
V-ing form
I could not be telegraphing you could not be telegraphing he could not be telegraphing we could not be telegraphing you could not be telegraphing they could not be telegraphing
Perfect
I could not have telegraphed you could not have telegraphed he could not have telegraphed we could not have telegraphed you could not have telegraphed they could not have telegraphed
V-ing perfect
I could not have been telegraphing you could not have been telegraphing he could not have been telegraphing we could not have been telegraphing you could not have been telegraphing they could not have been telegraphing
Interrogative form
Simple form
could I telegraph? could you telegraph? could he telegraph? could we telegraph? could you telegraph? could they telegraph?
V-ing form
could I be telegraphing? could you be telegraphing? could he be telegraphing? could we be telegraphing? could you be telegraphing? could they be telegraphing?
Perfect
could I have telegraphed? could you have telegraphed? could he have telegraphed? could we have telegraphed? could you have telegraphed? could they have telegraphed?
V-ing perfect
could I have been telegraphing? could you have been telegraphing? could he have been telegraphing? could we have been telegraphing? could you have been telegraphing? could they have been telegraphing?
Interro-negative form
Simple form
could I not telegraph? could you not telegraph? could he not telegraph? could we not telegraph? could you not telegraph? could they not telegraph?
V-ing form
could I not be telegraphing? could you not be telegraphing? could he not be telegraphing? could we not be telegraphing? could you not be telegraphing? could they not be telegraphing?
Perfect
could I not have telegraphed? could you not have telegraphed? could he not have telegraphed? could we not have telegraphed? could you not have telegraphed? could they not have telegraphed?
V-ing perfect
could I not have been telegraphing? could you not have been telegraphing? could he not have been telegraphing? could we not have been telegraphing? could you not have been telegraphing? could they not have been telegraphing?