“补足语”用英语怎么说？

(宾语补足语)我听到妹妹在外面用英文唱那首歌.My sister was heard singing that song in English outside.这数学家总是锁着门在书房工作.(这句是介词宾语的补足语.)The mathematician always works in his study with the door locked.(作宾语补足语)我们在努力使环境变得更干净、更安全.We're making ev...