| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [noun] had [been] [v-ing] | 54 |
|
| 2 | [Wh det] [noun] [vb past] been [v-ing] | 54 |
|
| 3 | [Wh det] [noun prp] [vb past] [been] [v-ing] | 40 |
|
| 4 | what [noun] [vb past] [been] [v-ing] | 22 |
|
| 5 | which [noun] [vb past] [been] [v-ing] | 21 |
|
| 6 | whose [noun] [vb past] [been] [v-ing] | 9 |
|
| 7 | [Wh det] [noun sg] [vb past] [been] [v-ing] | 8 |
|
| 8 | [Wh det] [noun] [vb past] [been] doing | 7 |
|
| 9 | [Wh det] [noun pl] [vb past] [been] [v-ing] | 6 |
|
