| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [pron] [be] [v-ing] | 10075 |
|
| 2 | 've [pron] [be] [v-ing] | 29 |
|
| 3 | [Wh det] 've [pron] [be] | 22 |
|
