| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] [verb] | 8600 |
|
| 2 | [pron] [is] [adv] [v-ing] | 5618 |
|
| 3 | [pers pn] [is] [adv] [v-ing] | 4534 |
|
| 4 | it [be] [adv] [v-ing] | 2875 |
|
| 5 | it [is] [adv] [v-ing] | 2153 |
|
