He told us that he had worked here since 10years before.这个句子

He told us that he had worked here since 10years before.这个句子 He told me that he had taught English since he came here. he worked here three years ago用since three years ago改写句子 He told me that he had lived in America for ten years before He said he had worked in that factory since 1949.这句是过去完成时的句子 He had worked for us for 10 years是过去完成时吧? He said that he has worked here for ten years and that he wa They told me that he had left 2 hours before He said he ( ) in that factroy since 1949.A.has worked B.had He said he had worked in that factory since 1949.這個時態是不是說明 他 He worked here for eight years! he said that he had been to Canada a few years ago这个句子正确吗?