| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [verb] [be] [v-ing] [prep] | 199 |
|
| 2 | it [verb] [be] [v-ing] [prep] | 135 |
|
| 3 | [Wh det] it [be] [v-ing] [prep] | 60 |
|
| 4 | [Wh det] it [verb] [be] [prep] | 53 |
|
| 5 | [Wh det] it [verb] [be] [v-ing] | 23 |
|
