This sentence" على أن يكون" is connected to preceding words, and the pronoun contained in it is a name (subject or object) mentioned earlier. the translation is "to be" the example =>على ان يكون يعمل ...:على أن يكون الفعل فيه مضارعا...

It's a condionnal sentense, and شرط أن يكون= على أن يكون means if in english Literally means: give me another example but the verb(in this example) should be at present tense. here's an example from ( the noble qur'an): قَالَ إِنِّي أُرِيدُ أَنْ أُنْكِحَكَ إِحْدَى ابْنَتَيَّ هَاتَيْنِ عَلَىٰ أَنْ تَأْجُرَنِي ثَمَانِيَ حِجَجٍ =>(the old man )said: "I wish to wed one of my two daughters to you, on condition that you stay in my service for eight years.

Ma Shaa Allah, Thank you all brothers and sisters for answering the questions. Besides, what my brothers and sisters have submitted I would like to add the following: It seems that this sentence is a part of exercise of a unit in a book! In Arabic we have three types of verbs; the first one is something like past and called in Arabic (ماض) which represents activities that happened in the past tense, the second verb represents the present and we call it (مضارع) and it can also represent the future tense by adding prefix letter or with association with some words and finally the third type of verbs is command verb which is (أمر) in Arabic. Back to your question, you are asked in this exercise to give a sentence with the second type of verbs, I will give you now a very simple sentence يقرأ حسن القرءان كل يوم. this sentence means Hassan reads Quran everyday ( I am sure this is a real sentence InSHaa Allah). Please let me know if what I have written is clear enough if not I will be more than happy to answer more question about it. Regards, Safy.

على أن يكون = شرط أن يكون Condition = شرط They tell you give an example but the verb should ( condition) be in present tense.

Give another example where the verb (must be) in the present tense