| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] it is [verb] | 1080 |
|
| 2 | [adv] difficult it is | 104 |
|
| 3 | difficult it is [verb] | 69 |
|
| 4 | [adv] difficult it [verb] | 27 |
|
| 5 | [adv] difficult is [verb] | 6 |
|
