| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] [vb infin] | 1098 |
|
| 2 | [modal v] [vb infin] could | 40 |
|
| 3 | [vb infin] could [vb infin] | 24 |
|
| 4 | [modal v] could [vb infin] | 19 |
|
