When は is used as the topic particle, it is pronounced wa, not ha.
So in これはあなたの本です, you read it as:
But when は is part of a normal word, it is usually pronounced ha.
This is just one of the standard spelling/pronunciation rules in Japanese.
Japanese sentence structure is often different from English.
This sentence works like this:
So Japanese is not really following the English order This is your book word-for-word.
Instead, it is more like:
As for this, your book it is.
Also, Japanese puts modifiers before the noun, so your book becomes あなたの本.
の often shows a relationship between two nouns.
In this sentence, it shows possession:
あなたの本 = your book
So の is often similar to English 's or of.
Some examples:
It does not always mean ownership only; it connects nouns in many ways.
です is the polite copula. In many beginner sentences, it works like is / am / are.
So here it completes the statement politely:
これはあなたの本です。
You can think of it as the polite ending that makes the sentence sound complete and courteous.
A less polite version would be:
これはあなたの本だ。
But beginners usually learn です first because it is more polite and safer to use.
Not always.
Although あなた does mean you, Japanese often avoids saying you when the context is clear. People also often use:
So while あなたの本です is grammatically correct, in real conversation it can sometimes sound more direct than English your.
For example, if you are talking to Tanaka, Japanese might prefer:
田中さんの本です。
It's Tanaka's book.
Or, if the context is obvious, just:
これは本です。
depending on the situation.
No. Japanese is normally written without spaces.
So the standard writing is:
これはあなたの本です。
Spaces are often added in beginner materials to make the parts easier to see:
これ は あなた の 本 です。
That is a learning aid, not normal everyday writing.
Yes. The usual beginner form is:
これはあなたの本ですか。
Is this your book?
You just add か at the end.
In casual speech, people may also ask with rising intonation instead of か, but ですか is the standard polite pattern beginners learn first.
Sometimes, but it changes the nuance.
This is neutral and very natural when talking about this as the topic.
If you said:
it would sound more like:
This is your book
with extra focus or identification, as if distinguishing this one from other things.
So は is the more basic choice here, while が adds emphasis or contrast depending on context.