| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [to-vb] the conclusion | 25 |
|
| 2 | it is difficult [to-vb] the conclusion | 25 |
|
| 3 | it is difficult to avoid the conclusion | 14 |
|
| 4 | it is difficult to escape the conclusion | 7 |
|
