| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have previously been | 33 |
|
| 2 | it have previously be | 33 |
|
| 3 | it have previously [been] | 33 |
|
| 4 | it had previously [be] | 19 |
|
| 5 | it has previously [be] | 13 |
|
