Last year 是過去時間提示詞,所以整個句子都跟過去時間有關(guān).又因?yàn)橹骶浜蛷木溆邢群箨P(guān)系,所以也可以用主句是過去時,而從句是過去完成時.Last year,after he had graduated from university,he went to study Chinese at Peking University.
但是,如果強(qiáng)調(diào)他大學(xué)一畢業(yè)就入北京大學(xué)學(xué)習(xí)漢語,那么就用用主句是過去時,而從句也是過去完成時.Last year,after he graduated from university,he went to study Chinese at Peking University.
后者更加符合我國教育的實(shí)際情況.同時也可以寫成Last year,after graduating from university,he went to study Chinese at Peking University.