Father, believe me, I can't stand up.

爸爸，相信我，我站不起来。

youdao

I can't get the pole to stand up.

我竖不起这杆子。

youdao

One site I came across used the analogy of a baby trying stand up by himself, hanging onto a table leg, and can't stand up.

我在无意浏览到的一个网站上看到过这样一个类比，我们就像一个试图自己站起来的婴儿，扶着桌腿，却站不起来。

youdao

I mean, I can't stand up straight.

我是说，我都站不直了。

Let's 实战 - SpeakingMax英语口语达人

"I can't see how you can dismantle five pieces of a tomb and stand it up, when some are going to be about 3ft by 3ft 6in (0.9 by 1.10m) and others are going to about 7ft (2.1m) long by 3ft 6in wide, " he said.

BBC: Vaults at La Cimetiere des Freres, St Peter Port