| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | approach have [adv] been [verb] by | 8 |
|
| 2 | approach have [adv] been [vb pp] by | 8 |
|
| 3 | approach has [adv] been [verb] by | 7 |
|
| 4 | approach have [adv] been [verb] by | 7 |
|
