| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [prep] [det] | 890 |
|
| 2 | [modal v] account [prep] [det] | 59 |
|
| 3 | could account [prep] [adj] | 14 |
|
| 4 | could account [prep] [det] | 11 |
|
