| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how [adj] it is | 666 |
|
| 2 | how difficult it be | 115 |
|
| 3 | how difficult it [be] | 115 |
|
| 4 | [adv] difficult it is | 104 |
|
| 5 | how difficult [pron] is | 80 |
|
| 6 | how difficult [pers pn] is | 79 |
|
| 7 | how difficult it [is] | 78 |
|
| 8 | how difficult it is | 77 |
|
