| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [prep] which have to | 9 |
|
| 2 | [det] of [Wh det] have to | 9 |
|
| 3 | all [prep] [Wh det] have to | 5 |
|
| 4 | [det] [prep] [Wh det] had to | 5 |
|
