| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [det] [art] [noun] | 159 |
|
| 2 | could [vb infin] [det] [art] [noun sg] | 121 |
|
| 3 | [modal v] [vb infin] [det] [art] difference | 74 |
|
| 4 | could [verb] [det] [art] difference | 18 |
|
| 5 | could [vb infin] [det] [art] difference | 18 |
|
| 6 | could [vb infin] [adj] [art] difference | 18 |
|
