Tā / suīrán / bú / shì / qīnshēng / érzi / què / yìzhí / bǎ / zhège / yìzǐ / dàngzuò / jiārén

他虽然不是亲生儿子，却一直把这个义子当作家人。

Although he was not his biological son, he had always treated this adopted son as family.