sit的过去式怎么写

This is the first time I've sat behind the wheel since the accident.

这是出车祸以来我头一次坐在方向盘前。

She sat outside, waiting to find out her fate.

她坐在外面，等待命运对她作出的安排。

I sat down for a moment to gather my strength.

我坐下片刻积蓄力量。

They sat down to consider the problem.

他们坐下来考虑这一问题。

She sat for hours together just staring into space.

她连续几个小时坐在那里怔怔地望着前面。