Sentence Corrections Needed

[tony1_hk]

What's wrong with the following sentences?

1. Please pass a sugar to his coffee.
2. Please pass to him a sugar to his coffee.
3. Locked away in a case, I was surprised to find my key.
4. Locked away the case, I was surprised to find my key.

Extra:
Is "the" the only definite article?

Thanks!

[Casiopea]

Hello tony.

Sorry. We try not to do homework assignments. Here are a few hints for you to work with:

1. Please pass a sugar to his coffee.
2. Please pass to him a sugar to his coffee.
3. Locked away in a case, I was surprised to find my key.
4. Locked away the case, I was surprised to find my key.

[tony1_hk]

Are my corrections correct?

1. Please pass the sugar to his coffee.
2. Please pass to him the sugar to his coffee. OR Please pass to him a cube of sugar to his coffee.

[Casiopea]

Hint #2

1. Please pass (the) sugar to his coffee.
2. Please pass him (the) sugar to his coffee.
3. Please pass him a cube of sugar to his coffee.

[tony1_hk]

Would it be correct if i change "to" to "for"?

Or can you tell me what's wrong with "to" in grammar? I have no idea why you highlight "to".

Thank you.

[Casiopea]

That's correct. "for" is the right choice.

[tony1_hk]

What's the meaning of "locked away"? I cannot find this in the dictionaries.

[Casiopea]

'locked away' means, hidden, out of sight.

[tony1_hk]

How about these corrections?

Locked away in a case, I was surprised to find my key.
->
- Searching in a locked case, I find my key surprisingly.
- Locking away in a case, I was surprised to find my key. (I think it's wrong)
- I was surprised to find my key which is locked away in a case.

[Casiopea]

1. Locked away in a case, I was surprised to find my key.
=> It means, you were locked away in a case.

2. Searching in a locked case, I find my key surprisingly.
=> It means, you were inside a locked case and seaching.
=> 'find' should be 'found'.
=> Try, While searching in an unlocked case, ...

3. Locking away in a case, I was surprised to find my key.
=> Again, you were locking away in a case.
=> 'locking away' is incorrect. You lock away something

4. I was surprised to find my key which is locked away in a case.
=> was ... was locked
=> no need for 'which was'.