| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [verb] [been] [adj] for | 273 |
|
| 2 | [vb mod] [verb] [been] [adj] for | 241 |
|
| 3 | [vb mod] [verb] [been] difficult [prep] | 22 |
|
| 4 | [vb mod] [verb] [been] difficult [prep] | 22 |
|
| 5 | [modal v] [verb] [been] difficult for | 20 |
|
| 6 | [vb mod] [verb] [been] difficult for | 20 |
|
| 7 | [vb mod] [verb] [be] difficult for | 20 |
|
| 8 | [vb mod] [verb] [been] difficult for | 20 |
|
