| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [vb pp] | 3866 |
|
| 2 | is [adv] [vb pp] [to-vb] | 1501 |
|
| 3 | it is [vb pp] [to-vb] | 1010 |
|
| 4 | it is [adv] [to-vb] | 96 |
|
| 5 | it [adv] [vb pp] [to-vb] | 11 |
|
