| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it [be] [adv] | 6461 |
|
| 2 | [v-ing] [subord] it [be] | 301 |
|
| 3 | [v-ing] it [be] [adv] | 205 |
|
| 4 | [v-ing] [subord] it [adv] | 12 |
|
