| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult it [modal v] be for | 6 |
|
| 2 | difficult it [vb mod] [be] for | 6 |
|
| 3 | difficult it [modal v] [be] for | 6 |
|
| 4 | difficult it [modal v] [be] for | 6 |
|
| 5 | difficult it [modal v] [be] for | 6 |
|
| 6 | difficult it [modal v] be for | 6 |
|
