| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [adj] for us | 350 |
|
| 2 | [be] difficult for [pron] | 190 |
|
| 3 | [be] difficult for [pers pn] | 162 |
|
| 4 | [be] difficult for us | 37 |
|
| 5 | [be] difficult for we | 37 |
|
| 6 | [be] difficult [prep] us | 37 |
|
| 7 | [be] difficult [prep] us | 37 |
|
