| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | since it have been [verb] | 32 |
|
| 2 | since it [verb] been [verb] | 32 |
|
| 3 | since it [verb] been [vb pp] | 31 |
|
| 4 | since it [vb -s] been [verb] | 23 |
|
| 5 | since it has been [verb] | 21 |
|
| 6 | since it had been [verb] | 9 |
|
| 7 | since it [vb past] been [verb] | 9 |
|
