| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to what extent can [noun] | 9 |
|
| 2 | to [pron] extent can [noun] | 9 |
|
| 3 | to [Wh det] extent can [noun] | 9 |
|
| 4 | to what extent can [noun] | 9 |
|
| 5 | to [pron] extent can [noun pl] | 6 |
|
