Left, right, up and down (po lewej stronie)

Left and right

Polish says on the left side and on the right side, never a bare left or right:

po lewej stronie — on the left. po prawej stronie — on the right.

Learn them whole. The endings inside them are Locative, which is exactly what the previous lesson introduced.

Up and down

na górze and na dole work the same way. In a building they mean upstairs and downstairs.

The adjective

lewy is the adjective left, and it agrees like any other: lewy pokój.

Here, again

tutaj is a longer, slightly more emphatic tu. Both mean here.