| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [verb] [prep] a | 1853 |
|
| 2 | [noun pl] has been [verb] [prep] | 834 |
|
| 3 | [noun pl] has [verb] [prep] a | 107 |
|
| 4 | [noun pl] has been [verb] a | 12 |
|
| 5 | [noun pl] been [verb] [prep] a | 7 |
|
