| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [be] [verb] for a | 491 |
|
| 2 | [be] [verb] for a period | 43 |
|
| 3 | [vb mod] [verb] for a period | 9 |
|
| 4 | [vb mod] [be] for a period | 5 |
|
