| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] it [verb] [adj] [noun sg] | 62 |
|
| 2 | it difficult [verb] [adj] [noun sg] | 29 |
|
| 3 | [vb past] it difficult [verb] [adj] | 29 |
|
| 4 | [vb past] it difficult [verb] [noun sg] | 10 |
|
