| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it [be] [not/n't] | 2938 |
|
| 2 | [v-ing] [subord] it [be] | 301 |
|
| 3 | [v-ing] it [be] [not/n't] | 136 |
|
