| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] could [vb infin] been | 133 |
|
| 2 | than [modal v] [vb infin] been | 104 |
|
| 3 | than could [verb] been | 7 |
|
| 4 | than could [vb infin] [be] | 7 |
|
| 5 | than could [vb infin] be | 7 |
|
| 6 | than could [vb infin] [been] | 7 |
|
