kakariin ga syorui wo atukau.

It is read:

かかりいん が しょるい を あつかう。

Word by word:

• 係員 = かかりいん
• が = が
• 書類 = しょるい
• を = usually pronounced お
• 扱う = あつかう

係員 means something like staff member, attendant, clerk, or person in charge.

The exact English translation depends on context. For example, it could mean:

• a station attendant
• an office clerk
• a staff member at a counter
• an official handling a certain task

So it is a general word for a person working in some assigned role.

が marks the subject of the sentence.

In 係員が書類を扱う, the subject is 係員, meaning the staff member is the one who performs the action.

So:

• 係員が = the staff member / it is the staff member who...

In many beginner sentences, you can think of が as showing who does the action.

を marks the direct object of the verb. In this sentence, 書類 is the thing being handled.

So:

• 書類を扱う = handle documents

Although it is written as を, in modern Japanese it is usually pronounced お.

扱う is a verb meaning to handle, to deal with, to manage, or sometimes to treat.

In this sentence, the most natural meaning is to handle or to process documents.

Depending on context, 扱う can also be used more broadly:

• 商品を扱う = to deal in / carry products
• 問題を扱う = to handle a problem
• 人を丁寧に扱う = to treat a person politely

So it is a flexible verb, and the exact English wording depends on what is being handled.

Japanese normally puts the verb at the end.

A very common basic pattern is:

subject + object + verb

So here:

• 係員 = subject
• 書類 = object
• 扱う = verb

That gives:

係員が書類を扱う。

This is different from English, where we usually say:

The staff member handles the documents.

Japanese and English organize sentence order differently.

It is in the plain non-past form.

That means it can express:

• present habitual action: The staff member handles documents
• future action: The staff member will handle the documents

Japanese non-past forms often cover both present and future, and the exact meaning depends on context.

So 扱う does not mean only present tense in the same way English does.

Japanese usually does not require articles like a or the, and nouns often do not change for singular vs. plural.

So:

• 係員 could mean a staff member or the staff member
• 書類 could mean a document, the document, or documents

Context tells you which meaning is intended.

This is very normal in Japanese. You should not expect every noun to show definiteness or plurality the way English does.

If you say:

係員は書類を扱う。

then 係員 becomes the topic rather than just the grammatical subject marker with が.

A simple way to think about the difference:

• 係員が書類を扱う = focuses more on who handles the documents
• 係員は書類を扱う = as for the staff member, they handle documents

In many situations, both are possible, but the nuance changes.

Very roughly:

• が can sound more identifying or specific
• は can sound more like introducing or discussing the topic

A polite version is:

係員が書類を扱います。

Here, 扱う changes to 扱います, which is the polite -ます form.

So:

• plain form: 扱う
• polite form: 扱います

The meaning stays basically the same, but 扱います is more appropriate in formal or polite conversation.

Yes, it is grammatically complete and natural as a basic example sentence.

However, in real conversation, Japanese often drops information that is already understood from context. So in a real situation, a speaker might say less if the subject is obvious.

Still, as a standalone example for learning grammar, 係員が書類を扱う。 is perfectly fine because it clearly shows:

• the subject with が
• the object with を
• the verb at the end