מחר זה הולך להיות יום ארוך במשרד, כי אני צריכה לסדר כל קלסר לפני הישיבה.

Hebrew often puts a time word at the beginning to set the scene first. So מחר means tomorrow, and starting with it gives the sense of:

As for tomorrow, it’s going to be a long day...

This is very natural in Hebrew. You could also place מחר later, but sentence-initial position is common and sounds smooth.

Literally, זה הולך להיות is something like:

this is הולך to be

But in real usage, it means it’s going to be.

This is a very common colloquial Hebrew way to talk about the future. It is similar to English going to.

So:

• זה הולך להיות יום ארוך = It’s going to be a long day

A shorter and more neutral version would be:

• מחר יהיה יום ארוך במשרד = Tomorrow will be a long day at the office

Here זה works a bit like the English dummy subject it in it’s going to be.

It does not refer to a specific object. It just helps form the expression.

So:

• זה הולך להיות קשה = It’s going to be hard
• זה הולך להיות יום עמוס = It’s going to be a busy day

This is especially common in spoken Hebrew.

Because הולך here agrees with זה, not with the speaker.

In זה הולך להיות, the subject is the dummy זה, which is grammatically masculine singular, so Hebrew uses הולך.

Later, in אני צריכה, the word צריכה does agree with the speaker, who is female.

So the two parts are doing different things:

• זה הולך להיות = impersonal expression, masculine singular because of זה
• אני צריכה = refers directly to the female speaker

In Hebrew, adjectives usually come after the noun.

So:

• יום ארוך = a long day
• משרד גדול = a big office
• ישיבה חשובה = an important meeting

Also, the adjective must agree with the noun in gender and number:

• יום is masculine singular
• therefore ארוך is masculine singular

If the noun were feminine, the adjective would change:

• ישיבה ארוכה = a long meeting

במשרד is made of:

• ב־ = in / at
• המשרד = the office

When ב־ is attached to a noun with ה־, they combine:

• ב + המשרד → במשרד

So במשרד means in the office or at the office.

This kind of contraction is very common in Hebrew:

• בבית = in the house / at home
• בשולחן = on the table if from ב + השולחן, depending on context and usage
• למשרד = to the office
• כמורה sometimes from כ + ה, though usage varies by form and style

Because the speaker is female.

צריך / צריכה means need to or have to, and it changes according to gender and number:

• אני צריך = I need to said by a male speaker
• אני צריכה = I need to said by a female speaker
• אנחנו צריכים = we need to for a masculine or mixed group
• אנחנו צריכות = we need to for an all-female group

So this sentence tells you that the speaker is a woman.

This is a very common Hebrew pattern:

צריך / צריכה + infinitive

It means need to, have to, or must depending on context.

Here:

• צריכה = need / am supposed to
• לסדר = to arrange / organize / put in order

So:

• אני צריכה לסדר = I need to organize
• אתה צריך ללכת = you need to go
• הם צריכים לעבוד = they need to work

The ל־ on לסדר is the normal infinitive marker, like English to in to organize.

לסדר is a very useful Hebrew verb. Its basic idea is to put in order.

Depending on context, it can mean:

• organize
• arrange
• tidy up
• sort out

In this sentence, because the object is כל קלסר, the best sense is probably organize or sort through each binder.

So לסדר כל קלסר could be understood as:

• organize each binder
• put each binder in order
• sort out each binder

Because כל + singular noun often means every or each.

So:

• כל קלסר = every binder / each binder

This is different from:

• כל הקלסרים = all the binders

That is an important distinction:

• כל קלסר = every single binder, one by one
• כל הקלסרים = all the binders as a group

קלסר means binder or sometimes ring binder.

It is a normal modern Hebrew office word, so in a workplace sentence like this it sounds perfectly natural.

Plural:

• קלסר = one binder
• קלסרים = binders

So:

• כל קלסר = every binder
• הקלסרים = the binders

Because הישיבה means the meeting: a specific meeting that both speaker and listener can identify from context.

So:

• לפני הישיבה = before the meeting

Without ה־, ישיבה would mean a meeting or meeting/sitting in a more general sense.

The sentence implies a particular meeting is coming up, so the definite form is the natural choice.

Also note:

• לפני = before
• הישיבה = the meeting

Together: before the meeting

In this sentence, אני is helpful and usually expected.

That is because צריכה shows gender and number, but not clearly person by itself. Without אני, צריכה could mean she needs to or, in the right context, imply I need to in informal speech.

So:

• כי אני צריכה לסדר... = clear and natural
• כי צריכה לסדר... = possible in casual speech, but less complete and more context-dependent

Unlike past and future tense verbs, present-tense forms and adjective-like forms such as צריך / צריכה often keep the pronoun for clarity.

No. It is natural, but it is not the only option.

A simpler version would be:

• מחר יהיה יום ארוך במשרד, כי אני צריכה לסדר כל קלסר לפני הישיבה.

That version is a little more straightforward and slightly less conversational.

So the difference is roughly:

• זה הולך להיות... = very common, spoken, conversational
• יהיה... = simpler, more neutral, a bit more direct

Both are correct.

A simple pronunciation guide is:

makhár ze holékh lihyót yom arókh ba-misrád, ki aní tsrikhá lesadér kol klásar lifné ha-yeshivá

A few notes:

• ח in מחר is the throaty Hebrew sound, like kh
• stress usually falls near the end:
  • מחר
  • להיות
  • ארוך
  • במשרד
  • צריכה
  • לסדר
  • לפני
  • הישיבה

If you want to sound natural, the sentence flows in two chunks:

• מחר זה הולך להיות יום ארוך במשרד
• כי אני צריכה לסדר כל קלסר לפני הישיבה