| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult it is [adv] | 5 |
|
| 2 | how difficult it is [adv] | 5 |
|
| 3 | [Wh adv] difficult it is [adv] | 5 |
|
| 4 | how difficult it is [adv] | 5 |
|
| 5 | difficult [conj] it is [adv] | 7 |
|
| 6 | difficult [subord] it is [adv] | 5 |
|
| 7 | difficult it is [verb] [adv] | 5 |
|
| 8 | difficult it is [to-vb] [adv] | 5 |
|
