| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what extent [modal v] [noun] | 18 |
|
| 2 | [prep] what [noun] [modal v] [noun pl] | 11 |
|
| 3 | [prep] [Wh det] extent [modal v] [noun pl] | 9 |
|
| 4 | [prep] what extent [modal v] [noun pl] | 9 |
|
| 5 | [prep] [pron] extent [modal v] [noun pl] | 9 |
|
