| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [conj] it is [verb] | 584 |
|
| 2 | [adv] [conj] it be [v-ing] | 273 |
|
| 3 | [adv] [conj] it [be] [v-ing] | 273 |
|
| 4 | [adv] [conj] [pron] is [v-ing] | 193 |
|
| 5 | [adv] [conj] it [is] [v-ing] | 178 |
|
