我们在机场为她送行。
wǒ men zài jī chǎng wèi tā sòng xíng.
We saw her off at the airport.
我去飞机场为他送行了。
wǒ qù fēi jī chǎng wèi tā sòng xíng le.
I have been to the airport to see him off.
我去车站为我朋友送行。
wǒ qù chē zhàn wèi wǒ péng you sòng xíng.
I went to the station to see my friend off.