Breakdown of أنا نسيت نظارتي لأن ذاكرتي ضعيفة اليوم.
أناana
I
يi
my / me (after a preposition)
نسيnasiya
to forget
لأنli'anna
because
Questions & Answers about أنا نسيت نظارتي لأن ذاكرتي ضعيفة اليوم.
How does the verb نسيت (I forgot) fit into our lesson on defective verbs?
The root of this verb is ن-س-ي. Because it ends in a weak letter (Yaa), it is a defective verb. When conjugating it in the past tense for I (أنا), the Yaa stays in the word and we just add the standard suffix ـتُ, making it نسيتُ (nasiytu).
In English, glasses is a plural word. Is نظارتي plural in Arabic?
No, the base word نظارة is singular in Arabic. It refers to a single pair of glasses. If you wanted to talk about multiple pairs of glasses, you would use the plural form نظارات.
Why do we use لأن (because) here instead of just بسبب (because of)?
You use لأن (li'anna) when you are introducing a full phrase with a subject and a description, like my memory is weak (ذاكرتي ضعيفة). If you just wanted to say because of my memory, you would use بسبب (bisabab).
Why is the word for weak, ضعيفة, in the feminine form here?
It describes the word for memory, ذاكرتي. If you remove the my ending (ـي), the base noun is ذاكرة. Since it ends in a taa marbuuta (ة), it is feminine, so its adjective must also be feminine.