| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could do [prep] a | 172 |
|
| 2 | could [adv] do [prep] | 76 |
|
| 3 | [adv] do [prep] a | 26 |
|
| 4 | could [adv] do a | 7 |
|
| 5 | could [adv] [prep] a | 5 |
|
