| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] the [noun] | 88142 |
|
| 2 | be [vb pp] [prep] [art] period | 272 |
|
| 3 | be [verb] [prep] the period | 113 |
|
| 4 | [be] [vb pp] [prep] the period | 105 |
|
