| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] difficult [verb] | 558 |
|
| 2 | it is [adv] [verb] and | 109 |
|
| 3 | is [adv] difficult [verb] and | 22 |
|
| 4 | it is [adv] difficult and | 9 |
|
| 5 | it [adv] difficult [verb] and | 8 |
|
| 6 | it is difficult [verb] and | 6 |
|
