我早就知道这个消息了。
wǒ zǎojiù zhīdào zhègè xiāoxī le 。
I have known this news for a long time.
她早就完成了作业。
tā zǎojiù wánchéng le zuòyè 。
She finished her homework a long time ago.
他们早就约好了见面。
tāmen zǎojiù yuē hǎole jiànmiàn 。
They had arranged to meet a long time ago.