Prepositions in Chinese

[website]

I hope someone can help me with prepositions in Putonghua, especially

to, for, and from.

For example, how would one say the following?

This part is from the bike.

This is for you. Gei ni zhege???

It stretches from Mexico to Romania.

It's up to you.

I can't get to him. Wo bu neng dao ta???

He was nice to other visitors.

[dalizee]

As far as I know (i'm a biginner, so..)

This is for you: 这个是为你的。

From Mexico to Romania: 从墨西哥到罗马尼亚

I can't get to him：我不能到他那儿

[renzhe]

This is for you. 这个是给你的 (if giving something), 这是为了你 (in general)

It stretches from Mexico to Romania. 从墨西哥到罗马尼亚

It's up to you. 随你的便 (more like: as you wish)

I can't get to him. << Is this literal or figurative?

He was nice to other visitors. 他对别的客人好

[Lu]

I hope someone can help me with prepositions in Putonghua, especially

to, for, and from.

There are no direct translations for these words, the translation depends on the sentence/structure.

[roddy]

This went unanswered four years ago, not sure why it was bumped. Don't expect the OP to turn up and say thanks.

[Guest realmayo]

Romania.