| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [art] [noun sg] | 7088 |
|
| 2 | could [vb infin] [art] [noun sg] | 7054 |
|
| 3 | [modal v] have [art] [noun sg] | 6425 |
|
| 4 | could have [art] [noun] | 407 |
|
| 5 | could have [art] [noun sg] | 390 |
|
