| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] have to be [verb] to | 5 |
|
| 2 | who have to be [verb] to | 5 |
|
| 3 | [Wh pn] had to be [verb] to | 5 |
|
| 4 | [Wh pn] have to be [vb pp] to | 5 |
|
