1. The first is far preferable to the second, in my view. However I would still make some minor amendments to that in the interests of concision and clarity. This would be my suggested wording: I wish to express my sincere gratitude to those people without whom it would not be possible to complete the work. Moving onto the relative pronoun ‘Whose’. We use the relative pronoun ‘whose’ at the beginning of a relative clause instead of using a possessive adjective. The possessive adjectives in English are my, your, his, her, its, our, your and their’. Look at these two sentences: ‘I have a brother. His car is red’. The object form of the relative pronoun is used as the object of a verb or a preposition, but because whom is very formal, it is not often used: in everyday English, who is usually used instead. Find out when to use “what” vs. “which” in different situations and how they can affect the meaning of what you say. Example sentences will help. https://goo.gl/a7evfC Click here and get the best resources online to master English grammar and improve your vocabulary with tons of content for FREE! ↓ Che 103 1 1 4. Yes, you can use whom. You can also use who. So we can't say why the author chose one and not the other. Maybe it was a deliberate decision, maybe they gave it no thought at all, maybe it is a typo. All of that is equally possible. – RegDwigнt. Oct 24, 2018 at 9:38. In formal situations, use "whom". .

how to use who whom whose