| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is [verb] [adj] | 1603 |
|
| 2 | [pron] is necessary [verb] | 1085 |
|
| 3 | is necessary [verb] [adj] | 207 |
|
| 4 | [pron] necessary [verb] [adj] | 55 |
|
| 5 | [pron] is necessary [adj] | 27 |
|
