| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [verb] [prep] [art] | 394 |
|
| 2 | [modal v] [vb infin] do [prep] [art] | 140 |
|
| 3 | could [vb infin] do [prep] [art] | 46 |
|
| 4 | could [verb] do [prep] [art] | 46 |
|
