| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [adv] [adj] [to-vb] [subord] | 30 |
|
| 2 | it 's [adv] [adj] [to-vb] [subord] | 25 |
|
| 3 | it 's [adv] difficult [to-vb] [subord] | 10 |
|
| 4 | it 's [adv] difficult [to-vb] [subord] | 10 |
|
