| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [modal v] [be] difficult for | 80 |
|
| 2 | but [pers pn] [modal v] [be] difficult | 29 |
|
| 3 | but [pers pn] [modal v] [be] for | 6 |
|
| 4 | but [pers pn] [be] difficult for | 5 |
|
