What it means
そうもない expresses that something appears very unlikely to happen or that there is little possibility of it happening. It attaches to the masu-stem of a verb and is often used when the speaker judges a situation from available evidence. The も adds emphasis, suggesting that the expected event does not seem likely at all. The polite counterpart is そうもありません.
Usage note
そうもない is a plain form, while そうもありません is its polite counterpart. Do not attach it directly to a dictionary-form verb; use the masu-stem instead, such as 守り from 守ります.
How to use it
彼は約束を守りそうもありません。
He is unlikely to keep his promise.
彼は約束を守りそうもない。
He is unlikely to keep his promise.
Example sentences
雨が強く降っているので、試合は始まりそうもない。
Because it is raining heavily, the match seems very unlikely to start.
この古い橋は、来年まで安全に使えそうもない。
This old bridge does not seem likely to remain safe to use until next year.
店員によると、人気の限定商品は今日中には売