| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [verb] [pron] | 9098 |
|
| 2 | [pron] could [vb infin] [pron] | 9031 |
|
| 3 | [pron] [modal v] do [pron] | 3798 |
|
| 4 | [pron] could do [pron] | 569 |
|
