C1
The reason why + S + V + is that + S + V · The thing that + V + is + N
强调型分裂句——The reason why / The thing that
讲解
用一个概括性的名词短语开头（the reason, the thing, the problem, the point, the place, the person），把想强调的部分放到句末。方向与 B2 阶段的 What matters is ... 相反：这里强调的部分在 is 之后，引导部分在前面。 常见错误：the reason why 之后用 is that，不要用 is because：The reason why he left is because he was tired ✗, The reason why he left is that he was tired ✓。
例句
The reason why she left is that nobody listened.
她离开的原因是没有人听她的。
The thing that annoys me is the noise at night.
让我烦恼的是夜里的噪音。
The problem with the plan is its cost.
这个计划的问题在于它的成本。
The person who signed it was the deputy, not the director.
签字的人是副手，不是主管。
练习
通过选择题测试你的掌握程度
高效学习“The reason why + S + V + is that + S + V · The thing that + V + is + N”
语法点“The reason why + S + V + is that + S + V · The thing that + V + is + N”（强调型分裂句——The reason why / The thing that）是 CEFR 5 级别的重要结构之一。要熟练运用这个结构，你需要弄清楚它的使用语境，并经常练习。
学习小贴士：把例句大声朗读多遍，培养自然的语感反应。然后试着结合自己的生活情境造句。用发音按钮听标准发音并跟着练习。
你也可以查看完整课程“”，更深入地了解相关的语法和词汇。