sit的過去式和過去分詞？

雙語例句：

I don't get much exercise sitting in the office all day.

我整天坐在辦公室很少運動。

There were several young people sitting around looking bored.

有幾個年青人閒坐着，一副無聊的'樣子。

Don't just sit watching television ─ make yourself useful!

別光坐着看電視——幫一下忙吧！

I don't pay you to sit around all day doing nothing!

我不是花錢僱你整天閒坐着的！

He sat taking notes of everything that was said.

他坐在那兒記下了所説的每一件事。