| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] at | 2439 |
|
| 2 | been working [prep] | 542 |
|
| 3 | been working [prep] | 542 |
|
| 4 | been [v-ing] at | 511 |
|
| 5 | be working at | 211 |
|
| 6 | [be] working at | 211 |
|
| 7 | been work at | 50 |
|
| 8 | been working at | 46 |
|
| 9 | [been] working at | 46 |
|
