| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to [be] [adj] to | 1675 |
|
| 2 | to [be] [adj] to | 1645 |
|
| 3 | to [be] essential [prep] | 25 |
|
| 4 | [prep] [be] essential to | 12 |
|
| 5 | [prep] [be] essential to | 12 |
|
| 6 | to [be] essential to | 12 |
|
| 7 | to [be] essential to | 12 |
|
