| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] a [adj] | 6098 |
|
| 2 | [vb pp] [prep] a [adj] period | 266 |
|
| 3 | be [vb pp] [prep] a period | 61 |
|
| 4 | be [vb pp] [prep] [adj] period | 12 |
|
