How to understand ...だけで...できる > **** **** > > **** * * * These are sentences which are found in textbook. I'm confusing in these two sentences. Here's my understanding. * * * In first sentence. > You can enjoy Karaoke with your friends, other **people also are allowed** > > You can enjoy Karaoke with your friends, other **people are denied** In second sentence. > You can press this button, you also **can press other buttons** > > You can press this button, you **are not allowed to press other buttons** Which is the correct way to understand?

means "You can enjoy Karaoke with only your friends". It means others are not allowed to join in the karaoke.

means "You have only to press the button." It doesn't refer to whether you can press other buttons or not.

If you want to mean …()…, you can use this phrase "just by ing". For example, I can tell what you're thinking just by looking at you.().