| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it difficult [verb] [noun] | 118 |
|
| 2 | [vb past] it [adj] [verb] [noun] | 117 |
|
| 3 | [vb past] [pron] difficult [verb] [noun] | 26 |
|
| 4 | [vb past] [pers pn] difficult [verb] [noun] | 26 |
|
| 5 | [vb past] it difficult [verb] [noun] | 26 |
|
