| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [vb pp] [prep] a | 4563 |
|
| 2 | [prep] be [vb pp] [prep] [noun pl] | 2052 |
|
| 3 | be [vb pp] [prep] a [noun pl] | 73 |
|
