| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [adv] been a | 616 |
|
| 2 | has [adv] been [prep] | 306 |
|
| 3 | [adv] been [prep] a | 189 |
|
| 4 | has been [prep] a | 130 |
|
