| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [been] [adj] for | 338 |
|
| 2 | [vb infin] [been] impossible [prep] | 40 |
|
| 3 | [verb] [been] impossible for | 17 |
|
| 4 | [vb infin] [be] impossible for | 13 |
|
