The reason he was late is that he missed the bus. （他迟到的原因是错过了公交车。）

She gave no reason for her sudden departure. （她没有为自己的突然离开给出任何理由。）

The main reason of the accident is speeding. （事故的主要原因是超速行驶。）

We need to find a good reason to cancel the meeting. （我们需要找一个合适的理由取消会议。）

There must be a reason why she's acting so strangely. （她表现得如此奇怪，肯定有原因。）

The reason for his failure is lack of effort. （他失败的原因是缺乏努力。）

Can you tell me the reason you changed your mind? （你能告诉我你改变主意的原因吗？） They had every reason to be proud of their son. （他们完全有理由为自己的儿子感到骄傲。）

The reason the flowers are dying is that they haven't been watered. （这些花快枯萎的原因是一直没浇水。）

I don't see any reason to doubt his words. （我没有任何理由怀疑他的话。）

The reason for the delay is a technical problem. （延误的原因是一个技术问题。）

You should have a valid reason to ask for leave. （你应该有一个正当的理由请假。）

The reason she's happy is that she got a promotion. （她高兴的原因是得到了晋升。）

There is no reason to panic. Everything is under control. （没有理由惊慌。

一切都在掌控之中。）

The reason of the misunderstanding is a simple miscommunication. （误会的原因是一次简单的沟通不畅。）

He came up with a creative reason to explain his mistake. （他想出了一个有创意的理由来解释自己的错误。）

The reason we lost the game is that we didn't play well enough. （我们输掉比赛的原因是我们打得不够好。）

Give me one good reason why I should believe you. （给我一个我应该相信你的充分理由。）

The reason for the new policy is to improve efficiency. （新政策出台的原因是提高效率。）

They couldn't find a logical reason for the strange phenomenon. （他们找不到这个奇怪现象的合理原因。

）