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仲間だけで歌を楽しむことができます
ボタンを押すだけでいいんです
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?
仲間だけで歌を楽しむことができます means "You can enjoy Karaoke with only your friends". It means others are not allowed to join in the karaoke.
ボタンを押すだけでいいんです 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 …した(する)だけで…できる, you can use this phrase "just by ～ing". For example, I can tell what you're thinking just by looking at you.(君を見るだけで、何を考えてるのか分かる).
