| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [adj] for us [verb] | 36 |
|
| 2 | [modal v] be difficult for [pron] [verb] | 30 |
|
| 3 | [modal v] be difficult for [pers pn] [verb] | 27 |
|
| 4 | [modal v] be difficult [prep] us [verb] | 5 |
|
| 5 | [modal v] be difficult for we [verb] | 5 |
|
| 6 | [modal v] [be] difficult for us [verb] | 5 |
|
| 7 | [modal v] be difficult for us [verb] | 5 |
|
| 8 | [modal v] be difficult [prep] us [verb] | 5 |
|
