| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [verb] [be] [v-ing] | 578 |
|
| 2 | 's [Wh det] [be] [v-ing] | 72 |
|
| 3 | 's [Wh det] [verb] [be] | 14 |
|
| 4 | 's [verb] [be] [v-ing] | 11 |
|
