| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [subord] a [noun] | 96 |
|
| 2 | be essential [subord] [noun] | 35 |
|
| 3 | be essential [subord] a | 8 |
|
| 4 | essential [subord] a [noun] | 5 |
|
