| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [verb] [conj] this | 225 |
|
| 2 | it is difficult [verb] [conj] | 164 |
|
| 3 | it is difficult [verb] this | 22 |
|
| 4 | is difficult [verb] [conj] this | 17 |
|
