不然,要不
(用在 if 引导的句子之后)不然,要不
used to introduce a different suggestion, after a sentence with if
I'll go if you're going. If not (= if you are not) I'd rather stay at home.你去我就去。不然的话,我宁愿待在家里。
(用于 yes/no 疑问句之后,表示如果答案是 no,将会或应该发生什么)
used after a yes / no question to say what will or should happen if the answer is'no'
Are you ready? If not, I'm going without you.你准备好了吗?否则我就自己去了。
(表示可能更大或更重要等)
used to suggest that sth may be even larger, more important, etc. than was first stated
They cost thousands if not millions of pounds to build.建设要耗费数千英镑,甚至可能是数百万英镑。
释义来自《牛津高阶英汉双解词典》第 9 版