| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult [pron] is for [noun] | 9 |
|
| 2 | how difficult [pron] is for [noun] | 8 |
|
| 3 | [Wh adv] difficult [pron] is for [noun] | 8 |
|
| 4 | how difficult [pron] is for [noun] | 8 |
|
| 5 | difficult [pron] is for [noun] [to-vb] | 8 |
|
| 6 | difficult [pron] is for [noun] [verb] | 8 |
|
