¿Cuál es la diferencia entre seit und vor y in und am ?Puedes dar oraciones como ejemplo.

"Seit" is used when saying something like "since 2003..." (seit 2003...). You can use "vor" with time and places. For example: "vor 2 Jahren..." (2 years ago...) or "vor dem Krankenhaus" (in front of the hospital). In those examples vor can mean "ago" or "in front of". "In" is the same as the english word "inside" (as in "inside the hospital" = in dem Krankenhaus) and "am" can be used in a lot of different ways but the most important way you should focus on at first is time: "Am 12. Dezember..." (on the 12th of December...), you can also use it for weekdays (for example "am Montag"). I hope this wasn't too confusing ^^;