“不起”常常跟在动词后面，表示做不到或没有能力做某件事。

"不起" often follows a verb, indicating inability or lack of capacity to do something.

比如“买不起”是没有钱买，“对不起”是说抱歉。

For example, "买不起" means cannot afford to buy, and "对不起" means to apologize.