| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] it necessary | 79 |
|
| 2 | [vb infin] it necessary | 79 |
|
| 3 | find it necessary | 29 |
|
| 4 | think it necessary | 18 |
|
| 5 | feel it necessary | 15 |
|
| 6 | consider it necessary | 9 |
|
