| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | he [vb past] been waiting for | 16 |
|
| 2 | he [vb past] be waiting for | 16 |
|
| 3 | he [vb past] [been] waiting for | 16 |
|
| 4 | he had [be] waiting for | 13 |
|
