| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [conj] [adj] [noun pl] | 381 |
|
| 2 | is necessary [verb] [adj] [noun pl] | 63 |
|
| 3 | is necessary [verb] [conj] [adj] | 17 |
|
| 4 | necessary [verb] [conj] [adj] [noun pl] | 13 |
|
| 5 | is necessary [conj] [adj] [noun pl] | 5 |
|
