I finished my homework. / I went to bed.  , Before I went to bed, I had finished my homework.  , She cooked dinner. / Her guests arrived. , Before her guests arrived, she had cooked dinner. , He studied English. / He moved to London. , He had studied English before he moved to London. , We cleaned the house. / Our parents came home.  , We had cleaned the house before our parents came home. , I met my best friend. / I moved to this city.  , I had met my best friend before I moved to this city. , They watched the movie. / They read the book.  , They had read the book before they watched the movie. , She ate breakfast. / She left for work.  , She had eaten breakfast before she left for work. , We finished lunch. / We went for a walk., We had finished lunch before we went for a walk..

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