| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] [vb past] be [v-ing] a | 23 |
|
| 2 | [Wh pn] [vb past] been [v-ing] a | 22 |
|
| 3 | [Wh pn] [vb past] [been] [v-ing] a | 22 |
|
| 4 | who [vb past] [be] [v-ing] a | 22 |
|
| 5 | [Wh pn] had [be] [v-ing] a | 20 |
|
