True: When I saw my mum, she was cooking. , I was cycling while my sister was studying. , I was sleeping when my phone rang. , I was doing my homework the whole morning yesterday. , She was playing the piano at 5 o'clock yesterday. , As my brother was doing his homework, I came home., False: While Rob cooked, his girlfriend came home. , As Rob cooked, his girlfriend watched TV. , She was playing the guitar when her mum vacuumed the carpet. , I spoke with my friend for 2 hours yesterday. , My cup was falling down as I was watching TV. , I was sleeping as my mum did some housework. , When I was talking to her she cried. ,

PastS PastC + while/when

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