come about

['kʌmə.baut]

发生, 改变方向

例句与用法：

How did it come about that he knew where we were?

他是怎么知道我们在什麽地方的呢？

Expected or required but not yet having come about.

期待发生的被期望或要求但仍未发生的

How did this come about?

这是怎么发生的?

词形变化：

动词过去式: came | 动词过去分词: come | 动词现在分词: coming | 动词第三人称单数: comes |

1. 发生

How did this come about?

这事是怎么发生的?

2. 变方向