| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] [Wh pn] [modal v] [vb infin] | 1574 |
|
| 2 | [noun pl] [pron] could [vb infin] | 1335 |
|
| 3 | [noun] [Wh pn] could [vb infin] | 587 |
|
| 4 | [noun pl] [Wh pn] could [verb] | 181 |
|
