| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [pron] [adv] [verb] | 615 |
|
| 2 | [pron] [adv] difficult [verb] | 400 |
|
| 3 | [vb pp] [pron] difficult [verb] | 70 |
|
| 4 | [vb pp] [pron] [adv] difficult | 55 |
|
| 5 | [vb pp] [adv] difficult [verb] | 36 |
|
