open的过去式和过去分词是什么

例句：

She has an open, trusting nature.

她天性坦率，容易相信别人。

She yanked open the drawer.

她猛地拉开了抽屉。

The door was suddenly flung open.

门突然被推开了。

The door was propped open.

门被支开着。

What if the parachute doesn't open?

降落伞打不开怎么办？