When you need to use two pronouns in the same sentence, the adverbial pronouns y (there) and en (some of it, of them) almost always come last. If your sentence has a pronoun for a person and also uses y or en, the person goes first. Both pronouns are placed right before the conjugated verb.
Giving and Serving with "en"
When serving food, pouring drinks, or pointing things out, you will often say you are giving "some" of it to someone. Combine the object pronoun for the person with en.
Notice that me and te drop their vowels before en to become m'en and t'en.
| Here is the dish, I am serving you some of it right away. | Voici le plat, je t'en sers tout de suite. |
For the third person, use lui en (to him/her some) or leur en (to them some):
| It is a good dish, I am serving him some of it. | C'est un bon plat, je lui en sers. |
| They are thirsty, I am pouring them a glass of it. | Ils ont soif, je leur en verse un verre. |
Accompanying with "y"
When you talk about guiding someone or dropping them off at a location, you combine the pronoun for the person with y (there). Just like with en, me and te drop their vowels to become m'y and t'y.
| You should go to the hospital, I am accompanying you there. | Tu devrais aller à l'hôpital, je t'y accompagne. |
| I am going to the station, he is dropping me off there. | Je vais à la gare, il m'y dépose. |
Combining "y" and "en"
If you ever need to use both y and en at the same time, y comes first. You will hear this most frequently with the expression il y a (there is / there are). To say "there is some of it", you say il y en a.
| There is some on the plate, that is enough for me. | Il y en a sur l'assiette, ça me suffit. |
| If there is still some of it, you should have some more. | S'il y en a encore, tu devrais en reprendre. |