| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [ex0] had [been] reports | 10 |
|
| 2 | [pron] had [been] reports | 10 |
|
| 3 | there had [been] reports | 10 |
|
| 4 | there had [been] reports | 10 |
|
| 5 | had [been] reports [prep] | 8 |
|
| 6 | had [been] reports [prep] | 8 |
|
