| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] during the period | 35 |
|
| 2 | be [vb pp] during the period | 34 |
|
| 3 | be [vb pp] during the period | 9 |
|
| 4 | was [vb pp] during the period | 7 |
|
| 5 | were [vb pp] during the period | 6 |
|
| 6 | is [vb pp] during the period | 5 |
|
