| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it difficult [to-vb] [adj] | 118 |
|
| 2 | it seems [to-vb] [adj] | 28 |
|
| 3 | it seems difficult [to-vb] | 15 |
|
| 4 | seems difficult [to-vb] [adj] | 6 |
|
