Sit

What is the context?

1. She sat in the place next to me.
She sat in the seat next to me.
She sat down next to me.

2. ... we had to sit in a place that was uneven and wet.

The first part isn't right. You can say "To take a short rest", but I don't understand what you mean by "at least".

1. What I want to say is "We had to sit in a place that was uneven and wet so that we took any little rest." How do I change the underlined part to a infinitive phrase?

2. If a listener knows the place, then, can I use 'the place' in the sentence?

lucas21c1. What I want to say is "We had to sit in a place that was uneven and wet so that we took any little rest." How do I change the underlined part to a infinitive phrase?

This is not right, and unfortunately I still cannot quite be sure what you are trying to say. Do you mean that you could not rest for long because it was too uncomfortable?

1. What I am trying to say is this: "The place was not suitable for taking a rest because it was uneven and wet. However, we had to do so there then because we needed to take any little rest."

2. Then, what infinitive phrase fits the underlined part of this sentence, "To ~, we had to sit in a place that was uneven and wet?"

Possibly this:

"To get what (little) rest we could, we had to sit ..."