[ابو بيشو]

اما بالنسبة للسؤال رقم 20
Very traditional grammar would dictate 'If I were he', because the verb 'to be' takes a complement, not an object. However, hardly anyone follows this rule any more and phrases such as 'If I were he' and 'that is she' sound ridiculously dated and pedantic.

So go with 'if I were him'.