had better not
had better not to
had not better
had not better to
本题考查不定式的用法。had better后跟动词原形(即不带to的不定式)，构成had better do sth.句型，表示“最好做某事”。注意：这里的had不能用have来替换。句意：在你找到另一份工作之前，你最好不要辞职。
