| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [adv prt] [prep] a | 692 |
|
| 2 | be [vb pp] [prep] a period | 61 |
|
| 3 | [vb pp] [adv prt] [prep] a period | 24 |
|
