| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] a | 790 |
|
| 2 | [noun pl] have been [prep] | 677 |
|
| 3 | [noun pl] have been a | 259 |
|
| 4 | [noun pl] have [prep] a | 31 |
|
