You could say 빌려보면 too, but 빌려보자면 sounds better. -자면 has two main use cases. 1. short for -자고 (말)하면 (if (they) ask/invite (you) to do ...), where -자고 expresses "let us". "친구가 같이 가자면/가자고 하면 나는 갈 것이다" = If my friend asks me to go with him, I will. 2. a softer, more colloquial sounding version of -(으)면. "나에 대해 말하자면, ..." = Speaking of me, ... (sounds more personal and natural than 말하면) Another example: 1. 휴일에 하루종일 집에 있으면 심심하다. 2. 휴일에 하루종일 집에 있자면 심심하다. About the same in meaning, (1) sounds like giving a fact in a detached, logical way, while (2) sounds like talking about one's own experience. So -자면 is a good choice when speaking of familiar actions and situations.

What does grammar mean in the sentence? https://gas-stationsnearme.com/ I have a few questions. What does mean? I don't understand what the grammar point sleep means in this sentence. Why wasn't it alone used?