| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [be] [v-ing] for a | 76 |
|
| 2 | [Wh pn] [be] [v-ing] for a | 55 |
|
| 3 | [Wh pn] [vb past] [be] [v-ing] for | 34 |
|
| 4 | [Wh pn] [vb past] [be] [v-ing] a | 23 |
|
