Which preposition should I use: on, at or by someone's side to mean to be in favour of somebody in an specific situation.

Please, I would also ask you to correct any minor mistake I have made and, If it's necessary, tell me if there is a better way to say what I am trying to convey.

Thanks in advance!


I think the preposition you want to use is on.

To be at or by someone's side usually means a close, physical presence. It conjures up images like this one, where three friends are walking side-by-side:

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To be on someone's side, though, usually means to be siding with them in an argument or dispute, or maybe supporting them in a tough situation.

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    by also has a figurative meaning. To be by someone's side suggests that you are there to provide help and support whenever needed even if you may not share the same objectives. Think of a president's wife standing by his side even if she disagrees with some of his policies. – Readin May 16 '16 at 5:18
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    "on" is also the term used for people who are on the same side of a sports team. If I am "by" Joe's side, then I am physically near him. If I am "on" his side, that simply means that we try to achieve the same goals, although I might be on the opposite side of the field/court than him. – TOOGAM May 16 '16 at 13:04

be on somebody's side

to support and agree with someone

  • I'm definitely on your side in this.
  • Whose side are you on anyway?

From Oxford dictionary

You can also say: I side with you. Meaning to agree with or support the opinions or actions of you.

If you say "stand at/by your side", it will figuratively mean remain loyal to someone.


All three have different meanings.

Being at someones side usually refers to a physical location, e.g. standing besides someone.

Standing by someone means to render (emotional) support. You can stand by someone and support him/her even if you don't share his/her views.

Being on someone side means that you share his views and have the same opinion on that matter.

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