| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] [vb mod] [vb infin] for a | 10 |
|
| 2 | who [modal v] [vb infin] for a | 10 |
|
| 3 | [Wh pn] [modal v] [vb infin] for a | 8 |
|
