The Russian word "по" is super useful! It can show movement and where something is. Its meaning can change a bit based on how it's used. Here are some simple explanations to help you understand:

1. Movement along a path or surface:

   • "по улице" means "along the street."
   • "по мосту" means "across the bridge."
   • Example: "Мы идем по улице." means "We are walking along the street."

2. Movement through an area or along a boundary:

   • "по городу" means "through the city."
   • "по парку" means "through the park."
   • Example: "Она поехала по городу." means "She drove through the city."

3. Distributing or sharing:

   • "по одному" means "one each."
   • "по три книги" means "three books each."
   • Example: "Давайте разделим по одному яблоку." means "Let's share one apple each."

4. Indicating time:

   • "по утрам" means "in the mornings."
   • "по выходным" means "on weekends."
   • Example: "Я занимаюсь спортом по утрам." means "I exercise in the mornings."

5. Used with special meanings for particular cases:

   • You use "по" with the dative case when talking about someone who is affected by something.
   • Example: "по словам учителя" means "according to the teacher's words."

In summary, "по" is a really flexible word. It can mean movement, sharing, and even time. Knowing these different uses will help you understand and use "по" better!