| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb past] it difficult [verb] | 103 |
|
| 2 | [pron] [vb past] it [verb] [noun] | 70 |
|
| 3 | [vb past] it difficult [verb] [noun] | 26 |
|
