| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [be] waiting for | 82 |
|
| 2 | [Wh pn] [be] waiting for | 26 |
|
| 3 | [Wh pn] had [be] waiting | 13 |
|
| 4 | [Wh pn] had [be] for | 5 |
|
