| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have been [adj] [adj] studies | 10 |
|
| 2 | there have been [adj] [adj] studies | 10 |
|
| 3 | there have been [adj] [adj] studies | 10 |
|
| 4 | [ex0] have been [adj] [adj] studies | 10 |
|
| 5 | [pron] have been [det] [adj] studies | 9 |
|
