| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] it [adj] [to-vb] [det] [noun] | 23 |
|
| 2 | [vb past] it [adj] [to-vb] [det] [noun] | 20 |
|
| 3 | [vb past] it difficult [to-vb] [det] [noun] | 6 |
|
| 4 | [vb past] it necessary [to-vb] [det] [noun] | 6 |
|
| 5 | [vb past] it necessary [to-vb] [det] [noun] | 6 |
|
| 6 | [vb past] it difficult [to-vb] [det] [noun] | 6 |
|
