| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [vb infin] it [adv] [adv] [to-vb] | 6 |
|
| 2 | [vb infin] it [adv] [adv] [adj] [to-vb] | 17 |
|
| 3 | [vb infin] it [adv] [adv] [adj] [to-vb] | 15 |
|
| 4 | [vb infin] it [adv] [adv] difficult [to-vb] | 8 |
|
| 5 | [vb infin] it [adv] [adv] difficult [to-vb] | 8 |
|
| 6 | [vb infin] it [adv] [adv] [to-vb] [pron] | 5 |
|
