| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] if [noun pl] [be] to | 11 |
|
| 2 | essential if [noun] [be] to | 9 |
|
| 3 | essential [conj] [noun pl] [be] to | 5 |
|
| 4 | essential if [noun pl] [be] to | 5 |
|
| 5 | essential if [noun pl] [be] [prep] | 5 |
|
| 6 | essential if [noun pl] [be] [prep] | 5 |
|
