| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it is [adv] [verb] | 688 |
|
| 2 | [conj] it is [adv] [v-ing] | 165 |
|
| 3 | [subord] it be [adv] [v-ing] | 136 |
|
| 4 | [subord] it [be] [adv] [v-ing] | 136 |
|
| 5 | [subord] [pron] is [adv] [v-ing] | 129 |
|
| 6 | [subord] [pers pn] is [adv] [v-ing] | 110 |
|
| 7 | [subord] it [is] [adv] [v-ing] | 100 |
|
| 8 | [subord] it is [adv] [v-ing] | 86 |
|
| 9 | [subord] it is [adv] [v-ing] | 56 |
|
