| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what [noun] [modal v] [art] [noun] | 47 |
|
| 2 | [prep] what circumstance [modal v] [art] [noun] | 6 |
|
| 3 | [prep] [pron] circumstance [modal v] [art] [noun] | 6 |
|
