| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] [verb] [adj] [noun sg] | 936 |
|
| 2 | [be] necessary [verb] [adj] [noun sg] | 155 |
|
| 3 | be necessary [verb] [adj] [noun sg] | 155 |
|
| 4 | is necessary [verb] [adj] [noun] | 126 |
|
| 5 | [is] necessary [verb] [adj] [noun sg] | 64 |
|
