| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun pl] could [vb infin] | 209 |
|
| 2 | [prep] [Wh det] [noun pl] could | 148 |
|
| 3 | [Wh det] [noun pl] could [vb infin] | 113 |
|
| 4 | [prep] [Wh det] could [vb infin] | 96 |
|
