PTE scores are built from items that contribute to more than one skill at a time, which is why some items are worth far more than their length suggests. Repeat sentence is one of the biggest: what you say back is marked for speaking AND counts towards listening.
You are scored on content, fluency and pronunciation. Content means the words you reproduce. That is the largest part, and it means a partial repetition said fluently beats a complete one said in pieces.
Listen for meaning, not for words. Trying to store a sentence as a string of sounds fails at about seven words. Understanding it lets you rebuild it — the grammar carries the rest. If you understood the sentence, you can usually produce it even where you did not catch every word.
Start immediately. The microphone opens straight after the recording and a long silence ends the item. Begin at once, at a normal pace, and keep going.
Never stop to correct. A restart costs fluency marks across the whole item, and the content you already said is not withdrawn. If you lose the thread mid-sentence, finish with whatever you have and say it smoothly.
Say the content words even if you cannot say all of them. Nouns, verbs and numbers carry the content score. Reproducing "the committee approved the revised budget in March" without the exact article beats a hesitant attempt at the whole thing.
Match the rhythm you heard. These recordings are read at natural speed with natural stress. Copying the rhythm — where the emphasis fell, where the speaker paused — improves the oral-fluency score and helps you remember the words as well.
And the companion item: write from dictation. Same principle, opposite skill: you hear a sentence and type it. It feeds both listening and writing, every correct word scores, and spelling counts. Type what you got. A partially correct sentence still earns.