| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [vb infin] [verb] [det] | 275 |
|
| 2 | they [modal v] [vb infin] [verb] [det] | 262 |
|
| 3 | they could [vb infin] [verb] [adj] | 36 |
|
| 4 | they could [verb] [verb] [det] | 21 |
|
