| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [pron] could [vb infin] | 6786 |
|
| 2 | [subord] [indef pn] [modal v] [vb infin] | 1209 |
|
| 3 | [conj] [indef pn] could [vb infin] | 594 |
|
| 4 | [subord] [indef pn] could [verb] | 241 |
|
