| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] [indef pn] [prep] [adj] | 434 |
|
| 2 | could [vb infin] [pron] [prep] [adj] | 306 |
|
| 3 | could [verb] [indef pn] [prep] [adj] | 72 |
|
| 4 | could [vb infin] [indef pn] [prep] [adj] | 72 |
|
