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