"I give him a hen."
Translation:Eu îi dau lui o găină.
Romanian has two forms of the object pronoun (here "him"): the stressed form ("lui") and the unstressed form ("îi"). The stressed form is optional, you can have a grammatically valid sentence without it. However, in this example it serves an important purpose: it specifies the gender of the receiver (the unstressed form does not vary by gender).
Eu îi dau lui o găină. - I give him a hen.
Eu îi dau ei o găină. - I give her a hen.
Eu îi dau o găină. - I give him/her a hen.