| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] on a | 299 |
|
| 2 | [noun prp] have been [verb] a | 226 |
|
| 3 | [noun prp] have been [verb] on | 155 |
|
| 4 | [noun prp] have [verb] on a | 50 |
|
