| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | if necessary [prep] [adj] | 17 |
|
| 2 | if necessary [prep] [adj] | 9 |
|
| 3 | if necessary [prep] [det] | 7 |
|
| 4 | if necessary with [adj] | 6 |
|
| 5 | if necessary [prep] such | 5 |
|
| 6 | if necessary [prep] such | 5 |
|
