Il mio quaderno è sul banco.

In Italian, possessives like mio, tuo, suo, nostro, etc. usually take a definite article:

• il mio quaderno = my notebook
• la mia penna = my pen
• i miei libri = my books

This is different from English, where we do not use the with my.

A very important exception: with many singular family members, Italian often drops the article:

• mio fratello = my brother
• mia madre = my mother

But quaderno is not a family word, so il is needed.

Because quaderno is a masculine singular noun.

Italian possessives must agree with the noun they describe, not with the owner. So:

• il mio quaderno = masculine singular
• la mia penna = feminine singular
• i miei quaderni = masculine plural
• le mie penne = feminine plural

The form depends on quaderno, not on whether the speaker is male or female.

Quaderno usually means notebook or exercise book, especially the kind used at school for writing notes or homework.

It is not usually the same as:

• libro = book
• agenda = planner/diary
• taccuino = small notebook/notepad

So quaderno often suggests a school or study notebook.

The accent is there because è means is.

This helps distinguish it from e, which means and.

So:

• è = is
• e = and

Examples:

• Il quaderno è sul banco. = The notebook is on the desk.
• Il quaderno e la penna. = The notebook and the pen.

The accent is very important in writing.

Sul is a combination of:

• su = on
• il = the

So:

• su + il = sul

This kind of contraction is very common in Italian with prepositions and articles.

Other examples:

• su + lo = sullo
• su + la = sulla
• su + i = sui
• su + gli = sugli
• su + le = sulle

So sul banco literally means on the desk.

Not exactly.

Banco often means a school desk or a classroom desk/bench. In this sentence, it most likely refers to that kind of desk.

Compare:

• banco = school desk, counter, bench depending on context
• tavolo = table
• scrivania = writing desk / office desk

So if this is a school-related sentence, banco is the natural word.

Because sul means on the desk, while nel means in the desk or inside the desk.

Compare:

• Il mio quaderno è sul banco. = My notebook is on the desk.
• Il mio quaderno è nel banco. = My notebook is in the desk.

So the preposition changes depending on the physical position of the object.

You can, but it is not the normal neutral order.

The usual word order is:

• il mio quaderno

Putting the possessive after the noun, as in il quaderno mio, can sound marked, emphatic, or stylistically special. For a learner, the standard pattern to use is:

• article + possessive + noun

So:

• normal: il mio quaderno
• less neutral / more emphatic: il quaderno mio

You would change the noun, article, possessive, verb, and preposition+article as needed:

• I miei quaderni sono sui banchi.

Breakdown:

• il → i
• mio → miei
• quaderno → quaderni
• è → sono
• sul → sui
• banco → banchi

So the whole sentence becomes My notebooks are on the desks.

A simple pronunciation guide is:

eel MEE-oh kwah-DER-no eh sool BAHN-ko

A few notes:

• qu in quaderno sounds like kw
• è is pronounced like eh
• gli does not appear here, so this sentence is fairly straightforward for pronunciation
• banco has a clear k sound before o

If you want to sound more natural, try saying it smoothly as one phrase rather than word by word.

No. Italian normally does not use a subject pronoun unless it is needed for emphasis or clarity.

The verb è already tells you the subject is it is in context, and the noun Il mio quaderno is the subject anyway.

So:

• Il mio quaderno è sul banco. = correct and natural

Adding a pronoun would usually be unnecessary here.