Subject + was/were + V.ing + Object.
ใช้บรรยายเหตุการณ์ที่กำลังเกิดขึ้นในอดีต
Examples.
– I was playing tennis when Lala came to my house.
– I was practicing my English skills every day, three times a day.
– I was writing a letter.
– The children were doing their homework when I got home.
I Find Knowledge 