| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [that] [adj] | 267 |
|
| 2 | is necessary [verb] [adj] | 85 |
|
| 3 | is necessary [verb] [that] | 51 |
|
| 4 | necessary [verb] [that] [adj] | 9 |
|
