He was very fastin spite ofbeing terribly overweight. Here the underlined part is a/an -

• He was very fast in spite of being terribly overweight. Here the underlined part is a/an -  Phrase preposition.
- Phrase preposition আর prepositional phrase এর মধ্যে পার্থক্য রয়েছে।
- Phrase Preposition: কয়েকটি word গুচ্ছগতভাবে Preposition এর কাজ করে।
-যেমন - in front of, because of, according to ইত্যাদি।

• Prepositional Phrase: Prepositional Phrase - Preposition দিয়ে শুরু হয়, কিন্তু Adjective Phrase বা Adverb Phrase এর মতো কাজ করে।
যেমন -
- A man of high intellect often feels lonely. (Prepositional Phrase/ Adjective Phrase)
- He is a man of great wealth. (Prepositional Phrase/ Adjective Phrase).