| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to [be] [vb pp] [prep] a | 3909 |
|
| 2 | to [be] [vb pp] [prep] [det] | 2622 |
|
| 3 | [be] [vb pp] [prep] a [det] | 308 |
|
| 4 | to [be] [vb pp] a [det] | 13 |
|
