| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] is necessary to understand [adj] [noun pl] | 5 |
|
| 2 | as is necessary to understand [adj] [noun pl] | 5 |
|
| 3 | as is necessary to understand [adj] [noun pl] | 5 |
|
| 4 | [conj] is necessary to understand [adj] [noun pl] | 5 |
|
