| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | if it [be] [verb] | 2009 |
|
| 2 | [v-ing] it [be] [verb] | 180 |
|
| 3 | [v-ing] if it [be] | 70 |
|
| 4 | [v-ing] if it [verb] | 27 |
|
