حرفٌ على أربعة وجوه الأوّل: المخفّفة من الثقيلة (انظر: أَنَّ الثاني: المصدريّة، وتدخل على الفعل المضارع فتنصبه، وعلى الفعل الماضي أيضاً. ويُسبَك منها ومن الفعل بعدها مصدرٌ مؤوّل نحو: [يسرّني أنْ تدرسَ = يسرّني دراستُك] و [سرّني أنْ نجحتَ = سرّني نجاحُك]. الثالث: التفسيرية، وهي بمنْزلة [أَيْ]، وتأتي بعد ما فيه معنى القول دون حروفه، نحو: [كتبتُ إليه أَنْ أَقْبِلْ = أي: أَقبِلْ] و [صِحْتُ به أَنْ كسَلُكَ مُضِرٌّ بك = أي: كسلك مضرّ بك]. الرابع: الزائدة، وتأتي في موضعين: بعد [لمّا] وقبل [لَوْ]، نحو: [لمّا أَنْ قَدِمَ استقبلتُه = لما قدِم...] و [أُقسم أنْ لوْ صَدَقْتَ لاَحْتُرِمتَ = أُقسم لو صَدَقْتَ...].

you are welcome to the Arab world. Firstly you have to make the difference between أن(/aen/) إن(/In/) the one you have asked about is pronounced /aen/ and you need to understand two of its main uses. It can convert a verb to its root or source (which is a noun) like 'It made me happy that you succeed 'يجعلني مسرورا أن تنجح " يجعلني" mean "made me" مسرورا means "happy" أن is equivalent to "That" instead of saying that we can say "يجعلني مسرورا نجاحك" Here (نجاحك) is a source or root of the verb (تنجح). You can see here that أن behaves as a modifier that modifies a verb to its root or source. The second use of أن is the interpretative where the phrase after أن gives the reason for the action that precedes the أن preposition. صحت به أن تجنب الكهرباء I shoot at him to avoid electricity. I shoot at him means " صحت به" avoid means "تجنب" here: أن is equivalent to "to"

there are two articles written the same way but with different tashkeel أن read : "An" (with sokoon on the noon) and أن read : "Anna" (with a shadda on the ن ) ---------------------------------- the first one "An" is used to express the infinitive. It's usually translated to "to" of the infinitive for example : I want "to play" أريد أن ألعب أريد : I want أن : to ألعب : play ---------------------------------- The second one "Anna" is used like in this sentence : (usually translates to "that") I know that Ahmad is a hardworking person أعلم أن أحمد شخص مجتهد أعلم : I know أن : that أحمد شخص مجتهد : Ahmad is a hardworking person Also "Anna" is attached to pronouns but "An" is NOT. because An is usually followed by a verb For example : I know that you are a hardworking person أعلم أنك شخص مجتهد أعلم : I know أنك : that you (the kaaf is a pronoun meaning "you") read : "Annaka" شخص مجتهد : are a hardworking person you can also find connected to other pronouns like : "أنها" Annaha : that she ... for example : I know that she is scared . أعلم أنها خائفة "أنهم" Annahom : that they ... for example : Sameer told me that they are travelling tomorrow سمير أخبرني أنهم سيسافرون غدا --------------------------------------------------------------- There is also a third article that is sometimes confused with "Anna" and "An" : إن "Inna" the Alef has a Kasra and the noon has a shadda. This one is used for emphasis and affirmation. so you can say : Ahmad is nice أحمد لطيف but you can emphasize it more by saying : إن أحمد لطيف : Inna Ahmad Lateef Indeed Ahmad is nice or Ahmad is really nice إن الله غفور رحيم : Indeed, god is oft forgiving, most merciful إن الله : Indeed , Allah غفور رحيم : is forgiving, merciful and Inna also can be connected with pronouns. like : إنه غبي : Indeed he is stupid إنه : Indeed he (the Haa is a pronoun . it means "he" or "him") غبي : is stupid or : إني آسف : Indeed I am sorry . or : I am really sorry إني : Indeed , I آسف