| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] also be due to | 8 |
|
| 2 | [modal v] also be due to | 8 |
|
| 3 | also be due to [art] | 5 |
|
| 4 | also be due to [art] | 5 |
|
