| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [verb] as a | 67 |
|
| 2 | it have been [vb pp] as a | 67 |
|
| 3 | it has been [verb] as a | 47 |
|
| 4 | it had been [verb] as a | 14 |
|
| 5 | it have been use as a | 13 |
|
| 6 | it have been used as a | 13 |
|
| 7 | it have been describe as a | 7 |
|
| 8 | it have been described as a | 7 |
|
| 9 | it 's been [verb] as a | 6 |
|
