| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was difficult for [pron] [verb] | 18 |
|
| 2 | it [was/were] difficult for [pron] [verb] | 18 |
|
| 3 | it [was/were] difficult for [pron] [to-vb] | 18 |
|
| 4 | it [was/were] difficult for [pron] [verb] | 18 |
|
| 5 | it [was/were] difficult for [pers pn] [verb] | 17 |
|
| 6 | it [was/were] difficult for him [verb] | 6 |
|
| 7 | it [was/were] difficult for he [verb] | 6 |
|
