| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] necessary for [art] | 66 |
|
| 2 | [was/were] necessary for [art] | 66 |
|
| 3 | was necessary for [art] | 58 |
|
| 4 | [was/were] necessary for the | 57 |
|
| 5 | [was/were] necessary for the | 57 |
|
| 6 | [was/were] necessary for a | 9 |
|
| 7 | were necessary for [art] | 8 |
|
| 8 | [was/were] necessary for a | 6 |
|
