| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb mod] [verb] been difficult [prep] | 20 |
|
| 2 | [pron] [vb mod] have [been] difficult [prep] | 20 |
|
| 3 | [pers pn] [vb mod] [verb] [been] difficult [prep] | 20 |
|
| 4 | [pron] [vb mod] have [been] difficult [prep] | 20 |
|
| 5 | [pron] [vb mod] [vb infin] [been] difficult [prep] | 20 |
|
| 6 | it [vb mod] [verb] [been] difficult [prep] | 20 |
|
| 7 | it [vb mod] [verb] [been] difficult [prep] | 20 |
|
| 8 | [pron] [vb mod] [verb] [been] difficult for | 18 |
|
| 9 | [pron] would [verb] [been] difficult [prep] | 14 |
|
