| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [vb base] [verb] a | 3938 |
|
| 2 | [vb base] [verb] a problem | 92 |
|
| 3 | i [verb] a problem | 51 |
|
| 4 | i [vb base] a problem | 34 |
|
| 5 | i [vb base] [verb] problem | 9 |
|
