| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to [be] essential | 31 |
|
| 2 | [vb pp] to [be] essential | 13 |
|
| 3 | [noun] to [be] essential | 10 |
|
| 4 | seem to [be] essential | 7 |
|
| 5 | [vb past] to [be] essential | 6 |
|
| 6 | shown to [be] essential | 5 |
|
| 7 | show to [be] essential | 5 |
|
| 8 | to [noun] [be] essential | 7 |
|
| 9 | to [noun sg] [be] essential | 6 |
|
| 10 | to [be] [art] essential | 26 |
|
| 11 | to [be] [art] essential | 26 |
|
| 12 | to [be] a essential | 17 |
|
| 13 | to [be] an essential | 17 |
|
| 14 | to [be] the essential | 9 |
|
| 15 | to [be] the essential | 9 |
|
| 16 | to [be] [adv] essential | 8 |
|
| 17 | to [be] [adv] essential | 8 |
|
| 18 | to [be] essential [prep] | 25 |
|
| 19 | to [be] essential [prep] | 25 |
|
| 20 | to [be] essential for | 12 |
|
| 21 | to [be] essential to | 12 |
|
| 22 | to [be] essential for | 12 |
|
| 23 | to [be] essential to | 12 |
|
