Questions & Answers about هو يعتقد أن الموعد اليوم.
In Arabic, the verb to be is usually omitted in the present tense.
So:
- الموعد اليوم literally looks like the appointment today
- but it means the appointment is today
This is called a nominal sentence. Arabic often says the equivalent of X today / X important / X here without adding a present-tense is or are.
If you wanted the past or future, Arabic would usually show that more explicitly, for example with كان for was.
Here أن means that and introduces a subordinate clause:
- هو يعتقد = he thinks / believes
- أن الموعد اليوم = that the appointment is today
So the whole structure is:
- هو يعتقد + أن + clause
A very important note: in fully vocalized Arabic, this is أَنَّ (with a doubled n sound), not the other أَنْ used before verbs.
This is one of the most common learner questions, because both are usually written as أن without vowels.
They are different words: