| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [prep] [indef pn] | 202 |
|
| 2 | could [vb infin] for [pron] | 156 |
|
| 3 | [modal v] [vb infin] for [indef pn] | 114 |
|
| 4 | could [verb] for [indef pn] | 14 |
|
