open的過去式和過去分詞是什麼

例句：

She has an open, trusting nature.

她天性坦率，容易相信別人。

She yanked open the drawer.

她猛地拉開了抽屜。

The door was suddenly flung open.

門突然被推開了。

The door was propped open.

門被支開着。

What if the parachute doesn't open?

降落傘打不開怎麼辦？