Question: Here is one sentence: I may be an hour.
Here is another sentence: It has been three years since my grandmother died. (similar to My grandmother died three years ago, but emphasizes the intervening period).
Does the be mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: A leak in a boat.
Here is another sentence: A leak in a roof.
Does the leak mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: Please focus on your studies and not on your hobbies.
Here is another sentence: We focused on what he wanted.
Does the focus mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: The voting process doesn't work as well as people thought.
Here is another sentence: This method doesn't work.
Does the work mean the same thing in the two sentences?

Answer:
the same meaning