| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a reason for | 70 |
|
| 2 | a reason for [pron] | 44 |
|
| 3 | [prep] reason for [pron] | 17 |
|
| 4 | [prep] a reason [pron] | 8 |
|
