| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [det] [noun] | 1346 |
|
| 2 | [modal v] [vb infin] [det] year | 153 |
|
| 3 | [vb mod] [vb infin] [det] year | 153 |
|
| 4 | could [vb infin] [adj] year | 43 |
|
| 5 | could [verb] [det] year | 17 |
|
| 6 | could [vb infin] [det] year | 17 |
|
