| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problem [modal v] [be] | 593 |
|
| 2 | [pos pn] problem [be] | 265 |
|
| 3 | [pos pn] problem [modal v] | 27 |
|
| 4 | [pos pn] [modal v] [be] | 20 |
|
