Read memorized part of Surah in prayer for repetition

Salam aleykum Is it permissible to read in prayer just part of a Surah witch I have memorized from the Quran so I can use it as a repetition? If it is so, what to do if I forget how to continue? Should I pick up the Quran, find the part and continue reciting while reading from the Quran in paryer? I found this Question . One problem I have with this answer is that the Imam in Taraweeh reads the whole Quran for the month of Ramadan. So he continues to read from the Quran from the last ayah where he stopped in the last rak'ah or prayer. Thank you.