Vi ĝuste pendigis la afiŝon.

you

Breakdown of Vi ĝuste pendigis la afiŝon.

• la: the
• afiŝo: the poster
• pendigi: to hang up; suspend

Questions & Answers about Vi ĝuste pendigis la afiŝon.

What does vi mean here? Is it singular or plural?

Vi means you, and it can be:

• singular: you
• plural: you all / you guys
• formal: polite you

Esperanto normally uses vi for all of these. There is an old singular informal form ci, but it is very rare in normal modern Esperanto.

What does ĝuste mean in this sentence?

Here ĝuste means something like correctly, properly, or accurately.

Depending on context, ĝuste can also mean exactly. So the exact English choice depends on what meaning was intended. In this sentence, it most naturally describes how the action was done: you hung the poster the right way.

Why is the verb pendigis and not just pendis?

Because pendi and pendigi are different verbs.

• pendi = to hang, to be hanging
  This is usually intransitive: the thing is already hanging.
• pendigi = to make something hang, to hang something up
  This is transitive: someone causes an object to hang.

So:

• La afiŝo pendis sur la muro. = The poster was hanging on the wall.
• Vi pendigis la afiŝon. = You hung up the poster.

This is a very common Esperanto pattern:
-ig- adds the idea cause/make.