| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | workers have been | 101 |
|
| 2 | workers have been | 58 |
|
| 3 | workers [vb base] been | 58 |
|
| 4 | workers [vb past] been | 31 |
|
| 5 | workers had been | 31 |
|
| 6 | workers has been | 12 |
|
| 7 | workers [vb -s] been | 12 |
|
