| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pers pn] when | 1927 |
|
| 2 | [prep] [pers pn] a | 1899 |
|
| 3 | [pers pn] when a | 36 |
|
| 4 | [prep] when a | 6 |
|
