我到了,你在哪里?
Wǒ dào le, nǐ zài nǎlǐ?
I've arrived, where are you?
我到学校了。
Wǒ dào xuéxiàole.
I arrived at the campus.
他经常工作到半夜。
Tā jīngcháng gōngzuò dào bànyè.
He frequently works until midnight.