Noun Indications in Arabic Language
There are few indications to recognize a part of speech as a noun;
1- If it is starts with the definition artiocle ( الـ ) like; قرأت الكتابَ.
2- If it is preceeded by any particle like;
ذهبتُ الى المدرسةِ - رجعتُ من البيتِ - أُكْتُبْ يا أحمدُ - مرحباً بالضيفِ .
3- If it ends with feminine taa'a or taa'a marboota like; فـتاة - غرفة - سـيـارة