| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | whether there have been [det] | 14 |
|
| 2 | whether there have been [det] | 14 |
|
| 3 | whether there have been any | 14 |
|
| 4 | whether there had been [det] | 6 |
|
| 5 | whether there has been [det] | 6 |
|
