| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [conj] [pron] [be] [v-ing] | 667 |
|
| 2 | [conj] [conj] it [be] [v-ing] | 181 |
|
| 3 | [subord] [conj] it [be] [verb] | 167 |
|
