| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | if [prep] [adj] [noun] | 404 |
|
| 2 | necessary [prep] [adj] [noun] | 375 |
|
| 3 | if necessary [prep] [noun] | 25 |
|
| 4 | if necessary [prep] [adj] | 17 |
|
| 5 | if necessary [adj] [noun] | 7 |
|
