| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there [verb] been [det] [adj] studies | 9 |
|
| 2 | there [verb] been [det] [adj] studies | 9 |
|
| 3 | there [verb] been [det] studies [prep] | 13 |
|
| 4 | there [verb] been [det] studies [prep] | 13 |
|
| 5 | there [verb] been [det] studies of | 12 |
|
| 6 | there [verb] been [det] studies of | 12 |
|
