| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] been [n mass] [num] | 5 |
|
| 2 | [vb mod] [vb infin] [been] [n mass] [num] | 5 |
|
| 3 | [modal v] have [been] [n mass] [num] | 5 |
|
