| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there must be [det] reason | 6 |
|
| 2 | there must be [det] reason | 6 |
|
| 3 | [pron] must be [det] reason | 6 |
|
| 4 | [ex0] must be [det] reason | 6 |
|
| 5 | [pron] must be some reason | 5 |
|
