помогите пожалуйста срочно!!!

tick the sentences with the Past Perfect Continous 1) Nick hes been playing since he was 5 2)Sheila was talking to her English teacher when l saw her 3) the concert had been on for half an hour when Jack joined us 4) they had been walking for three hours when they bumped into a passer-by
5)Ben was too tired as he had been writing his report for the whole day
6)What have you been doing since we last met.7)Listen! Martin is playing the violin again!
8)Boris was hungry as he hadn't had anything to eat since yesterday

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