| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | are [adj] [prep] [noun] | 5545 |
|
| 2 | [be] necessary [prep] [noun] | 285 |
|
| 3 | be necessary [prep] [noun] | 285 |
|
| 4 | are necessary [prep] [noun] | 33 |
|
| 5 | [am/are] necessary [prep] [noun] | 33 |
|
