cuaderno

I need a notebook for school.

This phrase is useful when expressing your needs. In this case, you are telling that you need a notebook (cuaderno) for school.

My notebook is blue.

With this phrase, you are describing the color of an object, indicating that your notebook (cuaderno) is blue.

Maria's notebook is in the backpack.

This phrase shows you how to use possessives in Spanish. You are saying that Maria's notebook (cuaderno) is in the backpack.

I lost my notebook in the park.

This phrase is used to express that something is lost, here it's your notebook (cuaderno) which you lost in the park.

Please, open your notebook.

This is an imperative sentence asking someone to open his/her notebook (cuaderno).

I'm looking for my notebook.

This phrase is used to state the ongoing action of searching for an object, in this case, your notebook (cuaderno).

This is my Spanish notebook.

With this phrase, you are specifically identifying that this is your notebook (cuaderno) where you do your Spanish work.

The sketchbook is mine.

This phrase is used to express possession, clarifying that the sketchbook (cuaderno) belongs to you.

I fixed the cover of my notebook.

This sentence demonstrates the past tense, indicating a completed action, here, the action of you mending the cover of your notebook (cuaderno).

I like Juan's notebook.

This phrase expresses an opinion or preference, stating that you like someone's (Juan's) notebook (cuaderno).