watasi ha ima tosyokan de nihongo wo benkyousite imasu.

When は is used as a topic particle, it is pronounced wa, not ha.

So in 私は, the は marks 私 as the topic: As for me... or I...

This is a very common point for learners:

• は as a particle → pronounced wa
• は as part of a normal word → usually pronounced ha

は marks the topic of the sentence.

In 私は今図書館で日本語を勉強しています, 私 is the topic, so the sentence is framed as:

As for me, I am currently studying Japanese at the library.

This is slightly different from an English subject marker. It does not simply mean “subject”; it tells the listener what the sentence is about.

Yes, it could absolutely be left out.

Japanese often omits words that are understood from context, especially pronouns like 私.

So:

• 私は今図書館で日本語を勉強しています。
• 今図書館で日本語を勉強しています。

Both can be natural, depending on context.

Including 私 may make the sentence clearer, more explicit, or more suitable for a beginner example.

今 often works like an adverb meaning now or right now, so it does not need a particle here.

In this sentence, 今 directly modifies the action:

• 今 = now
• 勉強しています = am studying

So 今 simply tells you when the action is happening.

You may sometimes see time expressions with particles, but with 今, having no particle is very common and natural.

Here, で marks the place where an action happens.

So:

• 図書館で = at the library / in the library

This is different from particles like:

• に for existence or destination in many cases
• で for the location of an action

Because studying is an action, で is used:

• 図書館で勉強する = study at the library

を marks the direct object of the verb.

In this sentence, 日本語 is what is being studied, so:

• 日本語を勉強しています = am studying Japanese

Even though Japanese is a language, it is treated grammatically as the object of study.

So:

• 何を勉強していますか。 = What are you studying?
• 日本語を勉強しています。 = I’m studying Japanese.

勉強しています shows an action that is currently in progress.

• 勉強します = I study / I will study
• 勉強しています = I am studying

Since the sentence includes 今 (now), using 勉強しています makes sense because it describes what is happening right now.

So:

• 今、日本語を勉強します。 can sound more like I will study Japanese now
• 今、日本語を勉強しています。 means I am studying Japanese now

It is built from the verb 勉強する (to study).

Step by step:

• 勉強する = to study
• 勉強して = te-form
• 勉強している = be studying / be in the state of studying
• 勉強しています = polite form of 勉強している

So 勉強しています is the polite present progressive form.

The basic meaning is the same, but the politeness level is different.

• 勉強している = plain style
• 勉強しています = polite style

So:

• 今図書館で日本語を勉強している。 → casual/plain
• 今図書館で日本語を勉強しています。 → polite

Learners are usually taught the polite form early because it is safer in many situations.

Yes, Japanese word order is more flexible than English, as long as the particles stay attached to the right words.

For example, these can all be possible depending on nuance:

• 私は今図書館で日本語を勉強しています。
• 私は図書館で今日本語を勉強しています。
• 今私は図書館で日本語を勉強しています。

The most important thing is that the particles still show the roles:

• は marks the topic
• で marks where the action happens
• を marks the object

That said, some orders sound more natural than others, and the original sentence is a very natural one.

The spaces are just for learners.

Japanese is normally written without spaces:

• 私は今図書館で日本語を勉強しています。

Textbooks and beginner materials often add spaces to help you see the parts of the sentence more clearly.

Japanese does not have articles like a, an, or the.

So 図書館 can mean:

• a library
• the library

The exact meaning depends on context.

Likewise, 日本語 just means Japanese, without needing an article.

This is normal in Japanese, and context usually makes the meaning clear.

Here, 日本語 clearly means the Japanese language.

It is made from:

• 日本 = Japan
• 語 = language

So:

• 英語 = English
• 中国語 = Chinese
• 日本語 = Japanese

In this sentence, because it comes before を勉強しています, it naturally means I am studying Japanese.