| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was difficult for [pron] [to-vb] | 20 |
|
| 2 | was difficult for [pers pn] [to-vb] | 19 |
|
| 3 | was difficult for him [to-vb] | 6 |
|
| 4 | was difficult for he [to-vb] | 6 |
|
| 5 | was difficult for they [to-vb] | 5 |
|
| 6 | was difficult for them [to-vb] | 5 |
|
