| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] show to be [adj] | 197 |
|
| 2 | [be] [verb] to be essential | 13 |
|
| 3 | [be] show to be essential | 5 |
|
| 4 | [be] show to [be] essential | 5 |
|
| 5 | [be] show [prep] be essential | 5 |
|
| 6 | [be] show [prep] be essential | 5 |
|
