| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [vb pp] a | 304 |
|
| 2 | it be [vb pp] [num ord] | 138 |
|
| 3 | be [vb pp] a [num ord] | 110 |
|
| 4 | it be a [num ord] | 94 |
|
