| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [modal v] [noun] [vb infin] | 106 |
|
| 2 | [Wh det] extent [modal v] [noun] | 18 |
|
| 3 | extent [modal v] [noun] [vb infin] | 5 |
|
