| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it [is] [adv] [verb] | 2453 |
|
| 2 | [conj] [pron] [is] [adv] [v-ing] | 1333 |
|
| 3 | [conj] it [be] [adv] [v-ing] | 759 |
|
