| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [be] work at the | 5 |
|
| 2 | [vb past] been work at the | 5 |
|
| 3 | [vb past] [be] working at the | 5 |
|
| 4 | [vb past] [been] work at the | 5 |
|
| 5 | [vb past] be work at the | 5 |
|
