| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [prep] a | 130 |
|
| 2 | [conj] has been [prep] | 120 |
|
| 3 | [conj] has been a | 62 |
|
| 4 | [conj] been [prep] a | 6 |
|
