| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] [v-ing] | 1371 |
|
| 2 | it [is] [adv] [subord] | 727 |
|
| 3 | [is] [adv] [v-ing] [subord] | 61 |
|
| 4 | it [is] [v-ing] [subord] | 25 |
|
