| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is necessary [verb] [adj] | 207 |
|
| 2 | is [adj] [verb] some | 172 |
|
| 3 | is necessary [verb] [det] | 98 |
|
| 4 | [be] necessary [verb] some | 46 |
|
| 5 | be necessary [verb] some | 46 |
|
| 6 | is necessary [verb] some | 24 |
|
| 7 | [is] necessary [verb] some | 24 |
|
