| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [v-ing] | 594 |
|
| 2 | is [adv] [v-ing] to | 338 |
|
| 3 | it is [v-ing] to | 166 |
|
| 4 | it is [adv] to | 91 |
|
| 5 | it [adv] [v-ing] to | 7 |
|
