| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to [be] [vb pp] [is] to [be] | 5 |
|
| 2 | to [be] [vb pp] [is] to [be] | 5 |
|
| 3 | [prep] [be] [vb pp] [is] to [be] | 5 |
|
| 4 | [prep] [be] [vb pp] [is] to [be] | 5 |
|
