| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [be] [v-ing] [prep] | 6304 |
|
| 2 | it [be] [v-ing] [prep] | 2418 |
|
| 3 | it [verb] [be] [prep] | 657 |
|
| 4 | it [verb] [be] [v-ing] | 434 |
|
| 5 | it [verb] [v-ing] [prep] | 214 |
|
