| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [noun] [modal v] [noun pl] | 20 |
|
| 2 | what extent [modal v] [noun] | 18 |
|
| 3 | [pron] extent [modal v] [noun pl] | 9 |
|
| 4 | [Wh det] extent [modal v] [noun pl] | 9 |
|
| 5 | what extent [modal v] [noun pl] | 9 |
|
