Who and Whom
"Hogyan kell személyekkel kapcsolatos kérdéseket megfogalmazni: Ki? Kit? Kivel? Kinek? Kitől? stb. Hogyan kérdezz személyekre? Ebben a videóban erre kapsz választ." Lados Olivér
A couple of weeks ago my wife decided to visit her family in London. So she sent an email to them recently. A day later she received a reply from her mom. Now my wife is packing and traveling to London with the kids next week. On the way she is going to visit and stay with her friends in Brighton.
A couple of weeks ago my wife decided to visit her family London. Let is focus on the persons in the sentens.
Who decided visit to family in London? My wife did.
Who will she visit in London? Her family.
To whom did she send an email? To her family.
Who did she send an email to? To her family.
A day later she received a reply from her mom.
From whom did she received a reply? Or
Who did she received a reply from? From her mom.
Now my wife is packing and travelling to London with the kids next week.
With whom is he travelling to London next week? Or
Who is she traveling to London with? With the kids.
On the way she is going to visit and stay with her friends in Brighton.
With whom is she going to stay in Brighton? Or
Who is she going to stay in Brighton with? With her friends.
So when you ask a question about the subject the person at the beginning of a sentence use who.
However if there is a preposition in front of the person in the sentence you will ask to whom? From whom? At whom? With whom? And so on, just as the preposition wants.
However you have got a choise here. As you say you can move preposition to the end the sentence.
Who did she send an email to?
Who did she receive a reply from?
Who is she travelling to London with?
Who is she going to stay in Brighton with?
beginning of a sentence mondat eleje