| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there have been [adv] [det] | 184 |
|
| 2 | there have been [adv] a | 75 |
|
| 3 | have been [adv] a [det] | 35 |
|
| 4 | there have been a [det] | 35 |
|
