| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 've [be] work at | 7 |
|
| 2 | 've [be] working at | 7 |
|
| 3 | 've be work at | 7 |
|
| 4 | 've been work at | 7 |
|
| 5 | 've [been] work at | 7 |
|
