13.1 phrasal verbs 1 Select the correct forms. a. They backup their files everyday. b. They back their files up everyday. c. They back them up everyday. d. They backup them everyday. a. One can breakdown the problem into several parts. b. One can break the problem down into several parts. c. One can break it down into several parts. d. One can breakdown it into several parts. a. If you ever come across this book, buy it. b. If you ever come this book across, buy it. c. If you ever come across it, buy it. d. If you ever come it across, buy it. a. We setup the apparatus. b. We set the apparatus up. c. We set it up. d. We setup it. answer (a) = verb + preposition + noun. Correct in all sentences answer (b) = verb + noun + preposition. Correct in 1, 2, 4 answer (c) = verb + pronoun + preposition. Correct in all sentences answer (d) = verb + preposition + pronoun. Incorrect in all sentences