| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it is [adv] | 4193 |
|
| 2 | [v-ing] it is [adv] | 123 |
|
| 3 | [v-ing] [subord] it is | 93 |
|
| 4 | [v-ing] [subord] it [adv] | 12 |
|
