היא הכינה לעצמה תה חם כדי להירגע אחרי שהמנהלת האשימה אותה בטעות.

Because the subject is היא (she), which is feminine singular. In Hebrew, past-tense verbs agree with the subject in gender and number.

• היא הכינה = she prepared
• הוא הכין = he prepared

The same thing happens later with האשימה: it is also feminine singular, matching המנהלת.

No. In הכינה and האשימה, the ה is part of the verb form, not the.

Compare:

• המנהלת = the manager
  Here the ה really is the definite article.
• הכינה, האשימה = verb forms
  Here the ה belongs to the verb pattern.

This is a very common beginner confusion, because Hebrew uses the same letter ה for different jobs.

לעצמה means for herself or to herself, depending on context. Here it means she made the tea for her own benefit.

• לה = to her
• לעצמה = to/for herself

Using עצמה makes it reflexive: the subject and the person benefiting are the same person.

So:

• היא הכינה לה תה could mean she made tea for her — for some other woman
• היא הכינה לעצמה תה means she made tea for herself

Because את is used before a definite direct object, and תה חם here is indefinite: hot tea, not the hot tea.

• היא הכינה תה חם = she made hot tea
• היא הכינה את התה החם = she made the hot tea

A useful rule:

• no את with indefinite nouns
• use את with definite direct objects

In Hebrew, adjectives usually come after the noun, not before it.

So:

• תה חם = hot tea
• בית גדול = big house
• ילדה קטנה = small girl

Also, the adjective must agree with the noun in gender and number. תה is masculine singular, so the adjective is חם.

Because תה is a masculine noun in Hebrew. Adjectives must match the noun they describe.

So:

• תה חם = hot tea
• מרק חם = hot soup
• but ארוחה חמה = hot meal

English speakers often expect object gender to be based on real-world sex, but in Hebrew all nouns have grammatical gender, including things like tea.

It introduces a purpose: in order to relax.

A very common Hebrew pattern is:

כדי + infinitive

Examples:

• כדי להירגע = in order to relax
• כדי ללמוד = in order to study
• כדי לעזור = in order to help

So this part explains why she made the tea.

These are related but different verbs:

• להירגע = to calm down / relax
• להרגיע = to calm someone or something down

Here she wants herself to become calm, so להירגע is correct.

Compare:

• היא שתתה תה כדי להירגע = she drank tea to relax
• היא דיברה בשקט כדי להרגיע את הילד = she spoke softly to calm the child

So להירגע is more like an intransitive or reflexive idea: to become relaxed.

אחרי ש־ means after followed by a full clause.

• אחרי העבודה = after work
• אחרי שהמנהלת האשימה אותה = after the manager accused her

The ש־ is a linking word, similar to that in some contexts, but here it simply helps introduce the clause after after.

In writing, it is commonly attached to the next word:

• שהמנהלת
• not usually written separately in this kind of sentence

Because אותה means her as a direct object.

• המנהלת האשימה אותה = the manager accused her
• המנהלת אמרה לה = the manager said to her

So:

• אותה = her
• לה = to her

This is an important distinction in Hebrew. English uses her for both jobs, but Hebrew separates them.

This is a great question, because the phrase can feel a little ambiguous.

Usually בטעות by itself means by mistake / mistakenly.

But the verb להאשים often uses ב־ for the thing someone is blamed for:

• להאשים מישהו בגניבה = to accuse someone of theft
• להאשים מישהו בטעות = to blame someone for a mistake

So out of context, האשימה אותה בטעות can potentially be understood in two ways:

• accused her by mistake
• blamed her for a mistake

Context usually makes it clear. This is exactly the kind of thing learners should notice, because Hebrew sometimes allows this kind of overlap.