أختي تساعد أمي أيضا، لكنها لا تحب أن تنظف المطبخ وحدها.

أختي means my sister. The -ي at the end is the possessive suffix meaning my.

So:

• أخت = sister
• أختي = my sister

Also, when this suffix is added, the final ـة of أختة is not written because the word is actually أخت already; the basic noun is أخت. The -ي simply attaches to it.

Pronunciation: ukhtī

Because the subject, أختي (my sister), is feminine singular.

In the present tense, Arabic verbs agree with the subject:

• هو يساعد = he helps
• هي تساعد = she helps

Since أختي refers to a female person, the verb must be feminine singular: تساعد.

In Arabic, the verb itself already shows the subject’s person and gender, so a separate pronoun is often unnecessary.

• تساعد already means she helps (or you help, depending on context)
• Since أختي comes before it, we know the subject is my sister, so no extra هي is needed.

This is very normal in Arabic.

Because أمي means my mother, and possession already makes the noun definite.

Compare:

• أم = a mother / mother
• الأم = the mother
• أمي = my mother

In Arabic, you do not say الأمي for my mother. The possessive suffix -ي already gives the idea of definiteness.

أيضا means also or too.

In this sentence, it comes after أمي:

• أختي تساعد أمي أيضا

This placement is very natural in Arabic. It tells us that the sister also helps the mother.

Arabic word order with words like أيضا can be a little flexible, but this position is common and clear.

لكنها is made of two parts:

• لكن = but
• ها = her / she

Together, لكنها means but she.

So:

• أختي تساعد أمي أيضا، لكنها...
• My sister also helps my mother, but she...

In fully vocalized Arabic, this is often written لكنّها, with a doubled ن sound, but in normal everyday writing the vowels and shadda are often omitted.

In Modern Standard Arabic, لا is commonly used to negate the present tense.

• تحب = she likes
• لا تحب = she does not like

So Arabic does not need a separate helping verb like English does.

Compare:

• She likes → هي تحب
• She does not like → هي لا تحب

This is a very common pattern.

After verbs like يحب (to like), Arabic often uses أن + present tense verb to express to do something.

So:

• تحب أن تنظف = she likes to clean
• literally: she likes that she clean

This is one of the standard ways Arabic expresses an infinitive-like idea, since Arabic does not have an infinitive in the same way English does.

Other examples:

• أريد أن أذهب = I want to go
• تحب أن تقرأ = she likes to read

تنظف here means she cleans / to clean in context after أن.

It comes from the verb نظّف (Form II), which means to clean.

Its present tense is:

• يُنظِّفُ = he cleans
• تُنظِّفُ = she cleans

After أن, the verb is technically in the subjunctive:

• أن تُنظِّفَ

In normal unvocalized writing, this often just appears as أن تنظف.

So learners may not see the grammatical change in writing, but it is there in full grammar.

المطبخ means the kitchen.

It has the definite article الـ, so:

• مطبخ = a kitchen / kitchen
• المطبخ = the kitchen

It is the direct object of تنظف:

• تنظف المطبخ = clean the kitchen

In fully vocalized formal Arabic, it would be accusative:

• المطبخَ

But in normal writing, the case ending is not shown.

Because وحدها refers back to أختي (my sister), which is feminine.

• وحده = alone, by himself
• وحدها = alone, by herself

So:

• لا تحب أن تنظف المطبخ وحدها
• she does not like to clean the kitchen by herself

The ending must match the person being described.

Yes. In this sentence, وحدها can naturally be understood as either:

• alone
• by herself
• on her own

All of these work well in English. The core idea is that she does not like doing the cleaning without someone else with her.

Arabic allows more than one common word order.

This sentence starts with the subject:

• أختي تساعد أمي
• literally: My sister helps my mother

This is a perfectly normal subject–verb–object order.

Arabic could also often use a verb-first structure in other contexts, but starting with أختي puts a little more focus on my sister as the topic.

So this word order is natural and common, especially in straightforward statements.

Yes. This sentence is natural Modern Standard Arabic and would be understood clearly in formal writing, school materials, news-style language, and general standard usage.

A few features that make it standard and natural are:

• تساعد for helps
• أيضا for also
• لكنها for but she
• أن تنظف after تحب
• وحدها for by herself

It is the kind of sentence a learner could safely use in MSA.

A careful pronunciation would be:

Ukhtī tusāʿidu ummī ayḍan, lakinnahā lā tuḥibbu an tunaẓẓifa al-maṭbakha waḥdahā.

A few useful notes:

• أختي = ukhtī
• أمي = ummī
• أيضا = ayḍan / often pronounced close to ayḍan
• لكنها = lakinnahā
• تحب = tuḥibbu
• تنظف = tunaẓẓifu (or tunaẓẓifa after أن in full grammar)
• وحدها = waḥdahā

If you are reading ordinary Arabic text without vowels, native speakers supply these pronunciations from grammar and familiarity.