| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to what extent [modal v] [noun] [vb infin] | 5 |
|
| 2 | [prep] what extent [modal v] [noun] [vb infin] | 5 |
|
| 3 | to what extent [modal v] [noun] [vb infin] | 5 |
|
| 4 | [prep] what extent [modal v] [noun] [vb infin] | 5 |
|
