| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [adv] [vb past] it difficult | 15 |
|
| 2 | [pers pn] [adv] [vb past] [pers pn] difficult | 14 |
|
| 3 | [pron] [adv] found [pers pn] difficult | 14 |
|
| 4 | he [adv] [vb past] [pers pn] difficult | 7 |
|
| 5 | he [adv] [vb past] [pers pn] difficult | 6 |
|
| 6 | [pron] still [vb past] [pers pn] difficult | 6 |
|
