| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [been] difficult for | 20 |
|
| 2 | [vb mod] have [been] difficult for | 20 |
|
| 3 | would have [been] difficult for | 14 |
|
| 4 | would have [been] difficult for | 14 |
|
| 5 | have [been] difficult for [art] | 9 |
|
| 6 | have [been] difficult for [art] | 9 |
|
| 7 | have [been] difficult for the | 7 |
|
| 8 | have [been] difficult for [pron] | 7 |
|
| 9 | have [been] difficult for the | 7 |
|
| 10 | have [been] difficult for [pers pn] | 5 |
|
