坐得

sit …

→ 坐
phrase Rare #27,528
sit … 得 introduces a complement describing how someone sits or the result or extent of sitting. In 坐得下, it means there is room to sit.
CH: 你可以坐得离窗户近一点。
EN: You can sit a little closer to the window.

我认识那个坐得最靠近门的男孩。

I know the boy sitting closest to the door.

坐得舒服。

Sit comfortably.

我在这儿坐得越久遇到危险的人就会越多

The longer I stay here, the more dangerous people I’ll encounter.

— 风吹麦浪 (2006)

不用坐得那么正

You don't have to sit so straight.

— 萤火虫之墓 (1988)