| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so far it has been [vb pp] | 6 |
|
| 2 | so far it has be [vb pp] | 6 |
|
| 3 | so far it has [been] [vb pp] | 6 |
|
| 4 | so far it has [be] [vb pp] | 6 |
|
