| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [conj] it [is] [verb] | 957 |
|
| 2 | [verb] [conj] [pron] [is] [v-ing] | 812 |
|
| 3 | [verb] [conj] it [be] [v-ing] | 553 |
|
