| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [noun sg] [vb mod] [noun] [vb infin] | 8 |
|
| 2 | what [noun sg] [modal v] [noun] [vb infin] | 8 |
|
| 3 | what extent [modal v] [noun] [vb infin] | 5 |
|
| 4 | what [noun sg] [modal v] [noun pl] [vb infin] | 5 |
|
