When I came back home,my father was watching TV yesterday 为什么watch要加ing?

i found the lights (开着)when i came back when i came back to dongguan,i will call you I () a stranger when I came back to England. Mum came back home when i ___(do) my homework. i ---(watch)TV when my parents came back When I came back it is raining 这句话对吗? I. came. back. ( ). the. when he came back to It was Sunday.I went to the museum with my friend ,Tom.There were lots of people._________________________________________________________________________________________________________________________________________________________We came back hom when he came to see me,after he found out i came back to home came last i back weekenddid when you back come的连词成句并翻一 Jenny is on holiday now.I wonder _____ A.when she will come back B.when she came back When I came back,I found my bicycle was_______A.missed B.losing C.robbed D.gone when i came back,i saw Tom（）adiaryA.writingB.was writing选哪个,为什么?快 I heard her ＿（sing） in the next room when I came back. when i came back ,i found my father ( )Alying B to lie C lain Dlay when i came back,i saw Tom（）adiaryA.writingB.was writing选哪个,为什么? i saw a boy _____(play) football in the street when i came back