| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [is] [adj] if | 89 |
|
| 2 | [adj] [is] [adj] if | 83 |
|
| 3 | [adj] [is] essential [conj] | 16 |
|
| 4 | [adj] [be] essential if | 13 |
|
| 5 | [adj] [is] essential if | 12 |
|
