AはBにしてもらう＝BはAにしてくれる？


There is an exercise problem in my workbook:

> **木村さん** ：明日は奈良を案内しますよ。  
>  **張さん** ：ありがとうございます。

Four options are provided (I only list the two that I find confusing):

> 1.張さんは木村さんに奈良を案内してもらいます。  
>  4.木村さんは張さんに奈良を案内してくれます。

and one is asked to choose the one that has the same meaning as the dialogue.
The answer given is the 1st one, but I chose the 4th one and still don't know
why it's wrong.




> Four options are provided (I only list the two that I find confusing):
>
> 1.張さんは木村さんに奈良を案内してもらいます。

This one is OK.

> 4.木村さんは張さんに奈良を案内してくれます。

This is wonky, should be あげます on the end.

> The answer given is the 1st one, but I chose the 4th one and still don't
> know why it's wrong.

くれます doesn't work here because くれる contains the speaker's gratitude/emotion,
so if you use くれます it's always something done by someone for you or yours.
Note that 4. isn't grammatically wrong at all, it just doesn't fit the
situation.

In the following situation it would work: I don't want to show Chou-san around
Nara, and Kimura offers to do it for me, so I say to someone
"木村さんは張さんに奈良を案内してくれます。" The reason it's wrong here is that it just doesn't fit
the meaning required.




> Four options are provided (I only list the two that I find confusing):
>
> 1.張さんは木村さんに奈良を案内してもらいます。

This one is OK.

> 4.木村さんは張さんに奈良を案内してくれます。

This is wonky, should be あげます on the end.

> The answer given is the 1st one, but I chose the 4th one and still don't
> know why it's wrong.

くれます doesn't work here because くれる contains the speaker's gratitude/emotion,
so if you use くれます it's always something done by someone for you or yours.
Note that 4. isn't grammatically wrong at all, it just doesn't fit the
situation.

In the following situation it would work: I don't want to show Chou-san around
Nara, and Kimura offers to do it for me, so I say to someone
"木村さんは張さんに奈良を案内してくれます。" The reason it's wrong here is that it just doesn't fit
the meaning required.

