That's impossible. Why do you ask it?
4 seconds sound clip from the The Curse of Frankenstein movie soundboard.
You can hear this line at 00:25:26.957 in the Blu-ray version of the movie.
Quote context
[...]
- I shan't be down for dinner. Make my excuses to Elizabeth, will you?
- Will you require anything else, madame?
- No, thank you. That'll be all.
- I shall take the master's dinner up now.
- Do you take your coffee black or white, Paul?
- Elizabeth, I don't know you very well, but I want you to do something for me.
- Yes?
- Leave?
- Yes. Leave this house at once, and never come back.
- That's impossible. Why do you ask it?
- I can't explain, but it will not be safe here.
- Not safe? Victor will be here all the time, won't he?
- Oh, yes. Victor will be here.
- It's because of Victor that I'm asking you to leave.
- He's conducting a series of experiments which could be extremely dangerous.
[...]