| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] a [noun] | 34350 |
|
| 2 | [verb] a problem | 1141 |
|
| 3 | [vb pp] [art] problem | 494 |
|
| 4 | [vb pp] [art] problem | 494 |
|
| 5 | [vb pp] a problem | 176 |
|
