| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [vb past] it [adj] | 1344 |
|
| 2 | [noun] [vb past] it [adj] | 968 |
|
| 3 | [noun] [verb] it difficult | 342 |
|
| 4 | [noun] [vb past] [pron] difficult | 143 |
|
| 5 | [noun] [vb past] it difficult | 140 |
|
