| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there have been [det] changes | 17 |
|
| 2 | there have been [det] changes | 13 |
|
| 3 | there [vb base] been [det] changes | 13 |
|
| 4 | there [verb] been many changes | 7 |
|
| 5 | there [verb] been some changes | 5 |
|
