| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [pron] [modal v] [verb] | 3917 |
|
| 2 | could [vb infin] [pron] [verb] | 1310 |
|
| 3 | could [vb infin] [pron] [modal v] | 110 |
|
| 4 | could [pron] [modal v] [verb] | 58 |
|
| 5 | could [vb infin] [modal v] [verb] | 24 |
|
