| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] shown to be [adj] | 196 |
|
| 2 | [be] shown to be [adj] | 189 |
|
| 3 | [be] [verb] to be essential | 13 |
|
| 4 | [be] [vb pp] to be essential | 10 |
|
| 5 | [be] shown [prep] be essential | 5 |
|
| 6 | [be] shown to [be] essential | 5 |
|
| 7 | [be] shown [prep] be essential | 5 |
|
| 8 | [be] shown to [be] essential | 5 |
|
| 9 | [be] show to be essential | 5 |
|
| 10 | [be] shown to be essential | 5 |
|
| 11 | [be] shown to be essential | 5 |
|
| 12 | [be] shown to be essential | 5 |
|
