| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was difficult for [pron] [to-vb] | 18 |
|
| 2 | it was difficult for [pron] [to-vb] | 18 |
|
| 3 | [pers pn] was difficult for [pron] [to-vb] | 18 |
|
| 4 | [pron] was difficult for [pron] [to-vb] | 18 |
|
| 5 | was [adv] difficult for [pron] [to-vb] | 13 |
|
| 6 | was [adv] difficult for [pron] [to-vb] | 10 |
|
