| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb past] it difficult [verb] | 10 |
|
| 2 | they found [pers pn] difficult [verb] | 10 |
|
| 3 | they [vb past] [pers pn] difficult [to-vb] | 10 |
|
| 4 | they [vb past] [pers pn] difficult [verb] | 9 |
|
