| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] not [verb] [been] easy for | 9 |
|
| 2 | [vb mod] not have [been] easy for | 9 |
|
| 3 | [vb mod] not [vb infin] [been] easy for | 9 |
|
| 4 | [vb mod] not [verb] been easy for | 9 |
|
| 5 | [vb mod] not have [been] easy for | 9 |
|
| 6 | [vb mod] not [verb] [been] easy for | 5 |
|
