| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] it [verb] [adj] [noun] | 48 |
|
| 2 | it difficult [verb] [adj] [noun] | 40 |
|
| 3 | [vb -s] it difficult [verb] [noun] | 15 |
|
| 4 | [vb -s] it difficult [verb] [adj] | 7 |
|
