| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] for a [adj] [noun sg] | 99 |
|
| 2 | necessary for a [adj] [noun sg] | 58 |
|
| 3 | [is] necessary for [adj] [noun sg] | 25 |
|
| 4 | [is] necessary for a [noun sg] | 12 |
|
| 5 | [is] necessary for a [adj] | 8 |
|
