| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] how difficult it [be] for | 20 |
|
| 2 | [vb base] how difficult it [be] for | 7 |
|
| 3 | [vb past] how difficult it [be] for | 5 |
|
| 4 | know how difficult it [be] for | 5 |
|
| 5 | know how difficult it [be] for | 5 |
|
| 6 | how difficult it [modal v] [be] for | 5 |
|
| 7 | how difficult it [vb mod] [be] for | 5 |
|
| 8 | how difficult it [be] for [noun] | 10 |
|
| 9 | how difficult it [be] for [pron] | 7 |
|
| 10 | how difficult it [be] for [noun pl] | 7 |
|
| 11 | how difficult it [be] for [pers pn] | 7 |
|
