| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [pron] is [adj] | 516 |
|
| 2 | [pron] [pron] is necessary | 21 |
|
| 3 | which [pron] [be] necessary | 19 |
|
| 4 | which [pron] be necessary | 19 |
|
| 5 | which [pron] [is] necessary | 12 |
|
