What does starting boundary marker mean?

Definition

A grammatical case particle following a place or time to mark the starting boundary of movement or an interval.

Example sentences

• I walk from home to school.🔊

  I walk from home to school.

• I use the internet from seven until eight.🔊

  I use the internet from seven until eight.

starting boundary marker in other languages

• In Portuguese
• In French
• In Japanese