| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb base] [pron] [verb] | 7540 |
|
| 2 | [vb base] [pron] difficult [verb] | 264 |
|
| 3 | [Wh det] [vb base] [pron] difficult | 12 |
|
