| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [adj] for | 389 |
|
| 2 | had been [adj] for | 386 |
|
| 3 | have been necessary for | 25 |
|
| 4 | [verb] been necessary for | 25 |
|
| 5 | had been necessary [prep] | 8 |
|
| 6 | had been necessary [prep] | 8 |
|
| 7 | had be necessary for | 5 |
|
| 8 | had been necessary for | 5 |
|
| 9 | had [been] necessary for | 5 |
|
| 10 | had been necessary for | 5 |
|
| 11 | had [be] necessary for | 5 |
|
| 12 | [vb past] been necessary for | 5 |
|
