| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [indef pn] could [verb] | 2038 |
|
| 2 | [indef pn] could [vb infin] | 2035 |
|
| 3 | [pron] could stop | 173 |
|
| 4 | [indef pn] [modal v] stop | 81 |
|
| 5 | [indef pn] could stop | 29 |
|
