| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult it is [verb] | 67 |
|
| 2 | [adv] [adv] it is [verb] | 52 |
|
| 3 | [adv] difficult it is [verb] | 21 |
|
| 4 | [adv] [adv] difficult it is | 7 |
|
