| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [verb] [vb pp] a | 3699 |
|
| 2 | [verb] [vb pp] a problem | 115 |
|
| 3 | i [verb] a problem | 51 |
|
| 4 | i [verb] [vb pp] problem | 8 |
|
