| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was [adj] for | 1012 |
|
| 2 | it be difficult for | 228 |
|
| 3 | it [be] difficult for | 228 |
|
| 4 | it was difficult [prep] | 80 |
|
| 5 | it was difficult [prep] | 80 |
|
| 6 | [pron] was difficult for | 56 |
|
| 7 | it [was/were] difficult for | 55 |
|
| 8 | [pers pn] was difficult for | 55 |
|
| 9 | it was difficult for | 55 |
|
| 10 | it was difficult for | 55 |
|
