| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how difficult [pers pn] [vb mod] | 30 |
|
| 2 | how difficult it [vb mod] | 28 |
|
| 3 | how difficult it [vb mod] | 28 |
|
| 4 | how difficult [pron] would | 12 |
|
| 5 | how difficult [pron] can | 10 |
|
