For no. 3, would you say these truncated versions are used often in the real world? I am not too familiar with terms like a 'truncated nonfinite clause' or a 'truncated prepositional phrase', but I do think I can guess what they might mean. Are these truncations done often in the real writing world?
Would you mind telling me how I can learn to use these 'truncation' techniques, so I can add some elegance to my writing? Read more? Study grammar books? Where should I start?