| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it more difficult [subord] | 12 |
|
| 2 | it [adv] difficult than | 11 |
|
| 3 | it [adv] difficult as | 9 |
|
| 4 | it as difficult [subord] | 9 |
|
| 5 | it very difficult [subord] | 5 |
|
