| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of which be [adj] to | 87 |
|
| 2 | of which be [adj] to | 86 |
|
| 3 | of which be essential [prep] | 7 |
|
| 4 | of which be essential [prep] | 7 |
|
| 5 | of which [be] essential to | 5 |
|
| 6 | of [Wh det] be essential to | 5 |
|
| 7 | [prep] which be essential to | 5 |
|
| 8 | of which be essential to | 5 |
|
| 9 | of which be essential to | 5 |
|
| 10 | of which be essential to | 5 |
|
| 11 | of [pron] be essential to | 5 |
|
