| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [verb] [to-vb] a | 6387 |
|
| 2 | [pron] [verb] a problem | 293 |
|
| 3 | [verb] [to-vb] a problem | 39 |
|
| 4 | [pron] [verb] [to-vb] problem | 14 |
|
