When we can omit the subject (or sometimes the verb) in the second part of "not only... but also" structure?
I have seen some examples:
- Not only is he handsome but also intelligent
- Not only does he speak English but he also speaks French
In the first example the "he is" is omitted, however in the latter the "he speaks" seems to be mandatory, hence we cannot write "Not only does he speak English but also French".
I want to know in which situations we can prevent repeating the subject in the second part? Only when we want to mention an adjective? Or every time that we have similar subjects we can ignore it in the "but also" part?
Any help would be appreciated.