| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [vb infin] [vb pp] [prep] [pron] | 1253 |
|
| 2 | [modal v] [vb infin] [vb pp] [prep] [pron] | 1253 |
|
| 3 | could [vb infin] [verb] [prep] [pron] | 230 |
|
| 4 | could [verb] [vb pp] [prep] [pron] | 178 |
|
| 5 | could [vb infin] [vb pp] [prep] [pron] | 178 |
|
