| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] is [adj] for | 43 |
|
| 2 | [conj] is necessary for | 25 |
|
| 3 | [subord] [be] necessary for | 19 |
|
| 4 | [subord] is necessary [prep] | 19 |
|
| 5 | [subord] be necessary for | 19 |
|
| 6 | [subord] [is] necessary for | 11 |
|
