| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [is] essential [conj] [noun] | 56 |
|
| 2 | [is] essential [conj] [adj] [noun] | 29 |
|
| 3 | [pron] [is] essential [conj] [adj] | 23 |
|
| 4 | [pron] [is] [conj] [adj] [noun] | 21 |
|
