היא תמיד מקלפת גזר לאט, כי קשה לה לעבוד מהר כשהיא עייפה.

Because they both refer to היא (she).

• מקלפת is the present-tense form of לקלף (to peel) for feminine singular.
• עייפה is the adjective tired in the feminine singular form.

In Hebrew, present-tense verbs and adjectives usually agree with the subject in gender and number.

Sometimes Hebrew can omit subject pronouns, but in the present tense it is very common to include them, because present-tense verb forms do not show person clearly.

For example, מקלפת can mean:

• she peels
• you (feminine singular) peel

So היא מקלפת makes it clear that the subject is she.

In Hebrew, the verb to be is usually not expressed in the present tense.

So:

• היא עייפה = she is tired
• literally, it is just she tired

The same thing happens in קשה לה:

• קשה לה = it is hard for her
• literally, hard to her

Literally, it means hard to her.

This is a very common Hebrew structure:

• קשה לי = it is hard for me
• קשה לך = it is hard for you
• קשה לה = it is hard for her

So Hebrew uses ל־ + pronoun (to / for someone) where English often says for someone.

After words like קשה (hard) or קל (easy), Hebrew usually uses an infinitive to say what is hard or easy to do.

So:

• קשה לה לעבוד מהר = It is hard for her to work quickly

Using עובדת there would not fit this structure.

כשהיא means when she.

It is made from:

• כש־ = when
• היא = she

In Hebrew, short prefixes like כש־ are usually written attached to the next word, so כש + היא = כשהיא.

A more formal version would be כאשר היא, but כשהיא is very common in everyday Hebrew.

Because they are adverbs:

• לאט = slowly
• מהר = quickly / fast

Hebrew adverbs usually do not change for gender or number, unlike many adjectives and present-tense verbs.

Hebrew has no indefinite article. There is no separate word for a or an.

So:

• גזר = a carrot
• הגזר = the carrot

That is why גזר can naturally mean a carrot without any extra word.

The most direct reading is a carrot, because גזר is singular.

But Hebrew sometimes uses a singular noun in a more general way, depending on context. If the speaker clearly meant plural carrots, the normal form would be גזרים.

So in isolation, a carrot is the safest reading.

That is a very natural Hebrew word order.

• היא תמיד מקלפת = She always peels

Adverbs like תמיד (always) often come:

• after the subject
• before the main verb

Other word orders are sometimes possible, but this one is standard and natural.

Because כשהיא עייפה is a separate clause: when she is tired.

That clause needs its own subject, just as in English:

• because it is hard for her to work quickly when she is tired

So the second היא is not redundant; it belongs to the when clause.

Yes. כי is a very common and natural way to say because.

Other options exist, such as:

• מפני ש־
• בגלל ש־

But כי is simple, common, and completely normal here.