| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what [noun] [noun] | 586 |
|
| 2 | [prep] what [noun] [modal v] | 505 |
|
| 3 | [prep] [noun] [modal v] [noun] | 87 |
|
| 4 | what [noun] [modal v] [noun] | 65 |
|
