| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] was difficult [verb] [prep] the | 9 |
|
| 2 | [pron] [was/were] difficult [to-vb] [prep] the | 9 |
|
| 3 | it [was/were] difficult [verb] [prep] the | 8 |
|
| 4 | it [was/were] difficult [verb] [prep] the | 8 |
|
| 5 | [pers pn] [was/were] difficult [verb] [prep] the | 8 |
|
