Translation of "jer" into English

Tom nije mogao da ode na fakultet jer njegova porodica nije imala dovoljno novca.

Tom couldn't go to college because his family didn't have enough money.

Istorija će biti ljubazna prema meni, jer ja nameravam da je napišem.

History will be kind to me, for I intend to write it.

To me je unervozilo, jer on i ja imamo prošlost.

That made me nervous, since me and him had history.

Јер учити есперанто је тешко за Кинезе-

Because it's difficult for the Chinese to learn Esperanto.

То је уобичајена учтивост јер претпостављам, да ћете ви доћи на сахрану мог оца.

It is a common courtesy since I assume that your family will be at my dad's as well.