| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [be] waiting for | 5 |
|
| 2 | [Wh pn] [vb past] been waiting for | 5 |
|
| 3 | [Wh pn] had [be] waiting for | 5 |
|
| 4 | [Wh pn] [vb past] [been] waiting for | 5 |
|
| 5 | [Wh pn] [vb past] be waiting for | 5 |
|
