| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] this study | 51 |
|
| 2 | be [vb pp] [prep] this study | 51 |
|
| 3 | be [vb pp] in this study | 33 |
|
| 4 | were [vb pp] [prep] this study | 23 |
|
| 5 | be included [prep] this study | 9 |
|
| 6 | be [vb pp] [prep] this study | 8 |
|
| 7 | are [vb pp] [prep] this study | 5 |
|
| 8 | be [vb pp] from this study | 5 |
|
| 9 | been [vb pp] [prep] this study | 5 |
|
