| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is necessary [to-vb] [adj] | 207 |
|
| 2 | is [to-vb] that [adj] | 107 |
|
| 3 | is necessary [to-vb] that | 50 |
|
| 4 | necessary [to-vb] that [adj] | 27 |
|
