| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [subord] [art] [noun sg] | 888 |
|
| 2 | be essential [subord] [art] | 49 |
|
| 3 | essential [subord] [art] [noun sg] | 40 |
|
| 4 | be essential [subord] [noun sg] | 12 |
|
