| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [adv] | 7590 |
|
| 2 | it is [adv] difficult | 732 |
|
| 3 | [conj] it is difficult | 483 |
|
| 4 | [conj] is [adv] difficult | 39 |
|
