| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult it [be] for | 31 |
|
| 2 | difficult [pers pn] [be] for | 31 |
|
| 3 | difficult [pers pn] be for | 31 |
|
| 4 | difficult [pers pn] [is] for | 22 |
|
| 5 | difficult [pers pn] is for | 22 |
|
| 6 | difficult [pers pn] was for | 9 |
|
| 7 | difficult [pers pn] [was/were] for | 9 |
|
