نسيت الكاميرا في البيت، ولذلك لا أستعملها اليوم.

In Arabic, the subject pronoun is often built into the verb, so نسيت already means I forgot.

• نسيت = I forgot
• the ending tells you the subject is I

So أنا is not necessary here. You could say أنا نسيت الكاميرا for emphasis, but in normal Arabic it is usually omitted.

It literally means I forgot, but in context it often has the natural English meaning I forgot the camera at home or I left the camera at home.

Arabic often uses نسي in situations where English might say:

• I forgot the camera
• I left the camera at home

So the Arabic is normal even if the English translation may vary a little depending on context.

الـ is the definite article, meaning the.

• كاميرا = a camera / camera
• الكاميرا = the camera

In this sentence, the speaker is talking about a specific camera, so the camera is appropriate.

Also, كاميرا is a borrowed word, but it behaves like a normal Arabic noun here.

Literally, في البيت means in the house / in the home, but in many contexts it is naturally translated as at home.

So:

• في = in
• البيت = the house / the home

Together, في البيت often corresponds to idiomatic English at home.

ولذلك means and therefore, so, or for that reason.

It is made of parts:

• و = and
• لذلك = therefore / for that reason

So ولذلك links the two ideas:

• I forgot the camera at home,
• therefore / so I am not using it today.

It is a formal and very common connector in Modern Standard Arabic.

Both لا and لن can negate verbs, but they are used differently.

• لا أستعملها اليوم = I do not use it today / I’m not using it today
• لن أستعملها = I will not use it

In this sentence, the speaker is talking about today in a general present-time sense, so لا is the natural choice.

Use لن when you want a clearer future meaning:

• لن أستعملها غدًا = I will not use it tomorrow

ها is an attached object pronoun meaning it or her.

So:

• أستعمل = I use
• أستعملها = I use it

Here ها refers back to الكاميرا.

Because كاميرا is treated as a feminine noun in Arabic, the pronoun used is ها.

In Arabic, nouns have grammatical gender, and that does not depend on whether the thing is biologically male or female.

كاميرا is treated as feminine, so when you refer back to it, you use feminine agreement:

• الكاميرا
• أستعملها = I use it

This is very common in Arabic. Many inanimate objects are grammatically masculine or feminine.

Yes, both are possible.

• أستعمل = I use
• أستخدم = I use

Both are standard in Modern Standard Arabic. In many contexts they are interchangeable.

So you could also say:

• نسيت الكاميرا في البيت، ولذلك لا أستخدمها اليوم.

That would still be correct.

Arabic often places time expressions flexibly, and اليوم at the end sounds very natural here.

• لا أستعملها اليوم = I’m not using it today

You may also see other placements, such as:

• اليوم لا أستعملها
• لا أستعمل اليوم الكاميرا (less natural for this exact sentence)

In this sentence, putting اليوم at the end cleanly adds the time information after the verb phrase.

Yes. Normal Arabic writing usually leaves out most short vowels.

A fully vocalized version could be:

نَسِيتُ الكاميرا في البيت، ولذلك لا أستعملُها اليومَ.

Those final short vowels are usually not written in everyday texts, newspapers, and most books.

So learners should know that:

• نسيت is really نَسِيتُ
• أستعملها is really أستعملُها
• اليوم may be اليومَ in full vocalization

In ordinary writing, all of these are commonly written without the short vowels.

This sentence is perfectly good Modern Standard Arabic.

A few notes:

• ولذلك is especially common in formal or written Arabic.
• أستعمل is standard and correct.
• In everyday spoken dialects, people would usually say this differently depending on the country.

So as an MSA sentence, it is natural and correct, especially in writing or careful speech.

The sentence has two parts:

1. نسيت الكاميرا في البيت

   • نسيت = I forgot
   • الكاميرا = the camera
   • في البيت = at home

2. ولذلك لا أستعملها اليوم

   • ولذلك = therefore / so
   • لا أستعملها = I do not use it / I’m not using it
   • اليوم = today

So the pattern is roughly:

• [verb + object + place], [connector] [negation + verb + object pronoun + time]

That is a very common and useful pattern in Arabic.