| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] what have been | 39 |
|
| 2 | [vb infin] what has been | 18 |
|
| 3 | know what have been | 13 |
|
| 4 | [vb infin] what had been | 11 |
|
| 5 | [vb infin] what 's been | 10 |
|
