| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] be essential | 31 |
|
| 2 | [vb pp] [prep] be essential | 13 |
|
| 3 | [noun] [prep] be essential | 10 |
|
| 4 | seem [prep] be essential | 7 |
|
| 5 | [vb past] [prep] be essential | 6 |
|
| 6 | show [prep] be essential | 5 |
|
| 7 | shown [prep] be essential | 5 |
|
| 8 | [prep] be [art] essential | 25 |
|
| 9 | [prep] be [art] essential | 25 |
|
| 10 | [prep] be an essential | 16 |
|
| 11 | [prep] be a essential | 16 |
|
| 12 | [prep] be the essential | 9 |
|
| 13 | [prep] be the essential | 9 |
|
| 14 | [prep] be [adv] essential | 8 |
|
| 15 | [prep] be [adv] essential | 8 |
|
| 16 | [prep] be essential [prep] | 25 |
|
| 17 | [prep] be essential [prep] | 25 |
|
| 18 | [prep] be essential to | 12 |
|
| 19 | [prep] be essential for | 12 |
|
| 20 | [prep] be essential to | 12 |
|
| 21 | [prep] be essential for | 12 |
|
