| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] been [adj] for | 338 |
|
| 2 | [verb] been difficult for | 25 |
|
| 3 | [vb infin] been difficult [prep] | 23 |
|
| 4 | [vb infin] been difficult [prep] | 23 |
|
| 5 | [vb infin] [been] difficult for | 21 |
|
| 6 | [vb infin] been difficult for | 21 |
|
| 7 | [vb infin] be difficult for | 21 |
|
| 8 | [vb infin] [be] difficult for | 21 |
|
