一个句子中是不可以的,这个是错句.应为Did Sam practice English last Saturday?
动词在陈述句中的过去时态是其过去式,在否定式或疑问句中其过去式是 助动词的过去式+动词原形 如：did/could/might/must/had not+do形式.
从句中可以有两个或以上个过去式.如：She said he was reading a book in the classroom